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SCSI2SD help

All,
I got a second SCSI2SD card in and made a 4 foot long ribbon cable with the IDE crimp on connectors and now have two DU: micro SD cards running on the PDP-11/83. It was a bit tricky configuring the two drives with the Emulex UC07 F.R.D. software embedded in the controller. Along the way of getting it working I got some bad settings and wiped my bootable SD RSX11M+ that I had SYSGENed. I reloaded the baseline RSX and got both cards configured properly and after it was all working, redid the SYSGEN, and NETGEN. I also loaded Johnny Billquist's TCP/IP and got it running by copying the RL02 .DSK image to a VCP virtual disk. Once TCP/IP was running I can ftp files from a local Linux machine and bring over other .DSK or .TAp images from bitsavers. The DECnet also is working well to Simh but the latest version (v4.0) with XQ thottle capabilities is important to avoid over runs on the real PDP-11s ethernet card.

If anyone has specific questions on the UC07 F.R.D. configuration and SCSI2SD let me know. I saved a copy of my interaction with it so I don't have to repeat my mistakes at some point in the future.

Matlock
I don't have any questions at this time, but I do use a UC17. So I may after I get the SCSI2D. Did RSTS support DecNet? I've never used or
been exposed to anything using DecNet.
 
UC07 F.R.D. and SCSI2SD dialog

UC07 F.R.D. and SCSI2SD dialog

I'm not yet knowledgeable enough regarding the UC07 and your setup to ask any specific questions, but I do hope to replicate your experience/configuration over the end-year holidays. So any notes that you'd care to share while it's fresh in your mind would certainly be appreciated!

Thanks,

paul

Paul,
Below is a copy of my dialog with F.R.D. I highly recommend reading the pages of the manual to understand the values that can be set. I have a long (4 ft.) unshielded cable so I chose a non-default setting for longer SCSI cables. Also, a PDP-11/83 with PMI memory (inserted above the CPU in the backplane) can allow the Qbus to be hogged by the disk controller more so I chose values of 8 for the DMA threshold and 2 for the DMA burst delay. Most everything else I took the default. Also, the UC07 thought the disks were RA81s although they are sized for RD54 size images. Eventually I do want to set the SD cards to be RA81 or bigger, but I am making changes one thing at a time.

Matlock


Using the SCSI2SD with Emulex UC07
Configuration of UC07 for two SCSI2SD cards.
Get a copy of UC0751001-F_UC07_Feb90.pdf
Details to invoke F.R.D. are on page 5-2


Testing in progress - Please wait

1 2 3 4 5 6 7 8 9

^C

Message 04 Entering Dialog mode

Commands are Help, Boot, List, Setup, Map and Test.
Type a command then press the RETURN key:

Hit Halt Button on Front, Invoke F.R.D. by entering code below

165232
@17772150/000000 1
17772152/005400 30003
@/000400 42000
@17772152/002000
@200G


Disk Firmware-Resident Diagnostic
Copyright (c) 1988 Emulex Corporation all rights reserved
UC07/8 controller, firmware revision level R
IP address = 172150

Option Menu
----------------------------------------------------------------------------
1 - Format 2 - Verify
3 - Format & Verify 4 - Data Reliability
5 - Format, Verify, & Data Reliability 6 - Read Only
7 - List Known Units 8 - Replace Block
9 - Write RCT 10 - Optical Read all Diag Sectors
11 - Optical Write a Diag Sector 12 - Issue Mode Select
13 - Display Novram 14 - Edit / Load Novram

Enter option number: 14

Note: let UC07 find and size the sd cards which need to be configured as to their size by scsi2sd-config before this.
also the cards should contain a good disk image at this point before letting UC07 try to figure them out)


Emulex automatic set-up of UCxx [Y or N, def=N]? Y

ALL DEVICES MUST BE POWERED UP AND READY

Hit any key to continue

SCSI ADDRESS 0 LUN 0, codesrc, RD54 , REV LEVEL = 3.4
SCSI ADDRESS 1 LUN 0, codesrc, SCSI2SD, REV LEVEL = 3.4

Unit offset if alternate controller address is selected, or
unit number to autoboot from if not alternate controller.
Enter unit offset/auto-boot unit number [0-15,def=0]:

Do you want to configure another unit [Y or N,def=N]?

Do you want to change any parameters [Y or N,def=N]? Y

Dma threshold [1-8,def=1]: 8

Dma burst delay in multiples of 2 [2-32,def=4]: 2

Host adapter scsi address [0-7,def=7]:

Enable scsi parity checking [Y or N,def=N]?

Enable ESP chip slow cable mode [Y or N,def=N]? Y

Unit offset if alternate controller address is selected, or
unit number to autoboot from if not alternate controller.
Enter unit offset/auto-boot unit number [0-15,def=0]:

ST506 = 1 ESDI/EMBEDDED = 2 Optical = 3 Auto-size = 4
Type code [1-4,def=4]: 4

Current media ID is: RA81

Do you want to change media ID [Y or N, def = N]?

Full capacity mode [Y or N,def=Y]?

Do you want to enable transparent replacements [Y or N,def=Y]?

Do you want to ignore FCT errors [Y or N,def=N]?

Disable scsi disconnects [Y or N,def=N]?

Prevent manual spin-down of mounted media [Y or N,def=N]?

Enable synchronous data transfers [Y or N,def=N]?

Disable host adaptor polling of drive [Y or N,def=N]?

Scsi controller address [0-7,def=0]: 0

Scsi logical unit number [0-7,def=0]: 0

Do you want to configure another unit [Y or N,def=Y]?

ST506 = 1 ESDI/EMBEDDED = 2 Optical = 3 Auto-size = 4
Type code [1-4,def=4]: 4

Current media ID is: RA81

Do you want to change media ID [Y or N, def = N]?

Full capacity mode [Y or N,def=Y]?

Do you want to enable transparent replacements [Y or N,def=Y]?

Do you want to ignore FCT errors [Y or N,def=N]?

Disable scsi disconnects [Y or N,def=N]?

Prevent manual spin-down of mounted media [Y or N,def=N]?

Enable synchronous data transfers [Y or N,def=N]?

Disable host adaptor polling of drive [Y or N,def=N]?

Scsi controller address [0-7,def=1]: 1

Scsi logical unit number [0-7,def=0]: 0

Do you want to configure another unit [Y or N,def=N]?

Do you want to change any parameters [Y or N,def=N]?

** ALL DATA ON DRIVE CAN BE LOST **
DO YOU WANT TO LOAD THE NOVRAM [Y or N]? Y

Option Menu
----------------------------------------------------------------------------
1 - Format 2 - Verify
3 - Format & Verify 4 - Data Reliability
5 - Format, Verify, & Data Reliability 6 - Read Only
7 - List Known Units 8 - Replace Block
9 - Write RCT 10 - Optical Read all Diag Sectors
11 - Optical Write a Diag Sector 12 - Issue Mode Select
13 - Display Novram 14 - Edit / Load Novram

Enter option number: 7

Drive Status Unit Size
-------------------------------
0 Available 311136
1 Available 311136

Hit any key to continue

Option Menu
----------------------------------------------------------------------------
1 - Format 2 - Verify
3 - Format & Verify 4 - Data Reliability
5 - Format, Verify, & Data Reliability 6 - Read Only
7 - List Known Units 8 - Replace Block
9 - Write RCT 10 - Optical Read all Diag Sectors
11 - Optical Write a Diag Sector 12 - Issue Mode Select
13 - Display Novram 14 - Edit / Load Novram

Enter option number: 13

Dma threshold [1-8] = 8

Dma burst delay in multiples of 2 [2-32] = 2

Host adapter scsi address [0-7] = 7

Enable scsi parity checking [Y or N] = N

Enable ESP chip slow cable mode [Y or N] = Y

Unit offset if alternate controller address is selected, or
unit number to autoboot from if not alternate controller.
Enter unit offset/auto-boot unit number [0-15] = 0

Hit any key to continue

ST506 = 1 ESDI/EMBEDDED = 2 Optical = 3 Auto-size = 4
Type code [1-4] = 4

Current media ID is: RA81

Full capacity mode [Y or N] = Y

Do you want to enable transparent replacements [Y or N] = Y

Do you want to ignore FCT errors [Y or N] = N

Disable scsi disconnects [Y or N] = N

Prevent manual spin-down of mounted media [Y or N] = N

Enable synchronous data transfers [Y or N] = N

Hit any key to continue

Disable host adaptor polling of drive [Y or N] = N

Scsi controller address [0-7] = 0

Scsi logical unit number [0-7] = 0

ST506 = 1 ESDI/EMBEDDED = 2 Optical = 3 Auto-size = 4
Type code [1-4] = 4

Current media ID is: RA81

Full capacity mode [Y or N] = Y

Do you want to enable transparent replacements [Y or N] = Y

Do you want to ignore FCT errors [Y or N] = N

Hit any key to continue

Disable scsi disconnects [Y or N] = N

Prevent manual spin-down of mounted media [Y or N] = N

Enable synchronous data transfers [Y or N] = N

Disable host adaptor polling of drive [Y or N] = N

Scsi controller address [0-7] = 1

Scsi logical unit number [0-7] = 0

Hit any key to continue

Option Menu
----------------------------------------------------------------------------
1 - Format 2 - Verify
3 - Format & Verify 4 - Data Reliability
5 - Format, Verify, & Data Reliability 6 - Read Only
7 - List Known Units 8 - Replace Block
9 - Write RCT 10 - Optical Read all Diag Sectors
11 - Optical Write a Diag Sector 12 - Issue Mode Select
13 - Display Novram 14 - Edit / Load Novram

Enter option number:
000402
@








Testing in progress - Please wait

1 2 3 4 5 6 7 8 9

Starting system




RSX-11M-PLUS V4.6 BL87 2044.KW System:"RSXMPL"
>RED DU:=SY:
>RED DU:=LB:
>RED DU:=SP:
>MOU DU0:"RSX11MPBL87"
>@DU:[1,2]STARTUP
>; PLEASE NOTE
>;
>; If you have not yet read the system release notes, please do so
>; now before attempting to perform a SYSGEN or to utilize the new
>; features of this system.
>;
>;
>* Please enter time and date (HH:MM DD-MMM-YYYY) : 9:41 27-JUL-2014
>TIME 9:41 27-JUL-2014
>ACS SY:/BLKS=1024.
>CON ONLINE ALL
>ELI /LOG/LIM
>CLI /INIT=DCL/CTRLC/DPR="<15><12>/$ /"
>INS LB:[1,1]RMSRESAB.TSK/RON=YES/PAR=GEN
>INS LB:[1,1]RMSLBL.TSK/RON=YES/PAR=GEN
>INS LB:[1,1]RMSLBM.TSK/RON=YES/PAR=GEN
>INS $QMGCLI
>INS $QMGCLI/TASK=...PRI
>INS $QMGCLI/TASK=...SUB
>QUE /START:QMG
>INS $QMGPRT/TASK=PRT.../SLV=NO
>QUE LP0:/CR/NM
>START/ACCOUNTING
>CON ESTAT LP0:
>QUE BAP0:/BATCH
>QUE BAP0:/AS:BATCH
>@ <EOF>
>sho dev
VF0: Offline Loaded Type=unknown
VF1: Offline Loaded Type=unknown
CO0: TT0: Loaded
TT0: [200,200] [200,200] - Logged in Loaded
TT1: Offline Loaded
VT0: Loaded
VT1: Loaded
RD0: Loaded
DL0: Offline Loaded Type=unknown
Seek_Optimization=Nearest:0.

DL1: Offline Loaded Type=unknown
Seek_Optimization=Nearest:0.

DU0: Public Mounted Loaded Label=RSX11MPBL87 Type=RA81
DU1: Loaded Type=RA81
DU2: Offline Loaded Type=unknown
DU3: Offline Loaded Type=unknown
MU0: Offline Loaded Type=unknown
NL0: Loaded
TI0:
CL0: TT0:
SP0: DU0:
LB0: DU0:
SY0: DU0:
>mou du1:/ovr/pub/vi
Volume Information
Class: Files-11
Device: DU01
Volume label:RSX11MPBL87
Pack serial: 00000001236
Owner: [1,1]
Protection: [RWCD,RWCD,RWCD,RWCD]
Default: [RWED,RWED,RWED,R]
Processor: F11ACP


>pip du:/fr

DU0: has 167997. blocks free, 143203. blocks used out of 311200.
Largest contiguous space = 147509. blocks
12122. file headers are free, 2878. headers used out of 15000.

>
>pip du1:/fr

DU1: has 168007. blocks free, 143193. blocks used out of 311200.
Largest contiguous space = 147509. blocks
12123. file headers are free, 2877. headers used out of 15000.
 
Last edited:
I don't have any questions at this time, but I do use a UC17. So I may after I get the SCSI2D. Did RSTS support DecNet? I've never used or
been exposed to anything using DecNet.

Tradde,
RSTS does have DECnet capabilities although I've never used RSTS much. I've been a RSX11 (M,S,M+) user and later some VMS, but lately I've been playing with RT-11 (it is shocking what can be done in 64K bytes!) and will likely get to RSTS at some point. There is a distribution of DECnet for RSTS at

ftp://ftp.trailing-edge.com/pub/rsts_dists/

DECnet is great to pass data between different DEC operating systems and ethernet connectivity in Simh is really good in the latest releases.


Matlock
 
Last edited:
Paul,
Below is a copy of my dialog with F.R.D. I highly recommend reading the pages of the manual to understand the values that can be set. I have a long (4 ft.) unshielded cable so I chose a non-default setting for longer SCSI cables. Also, a PDP-11/84 with PMI memory (inserted above the CPU in the backplane) can allow the Qbus to be hogged by the disk controller more so I chose values of 8 for the DMA threshold and 2 for the DMA burst delay. Most everything else I took the default. Also, the UC07 thought the disks were RA81s although they are sized for RD54 size images. Eventually I do want to set the SD cards to be RA81 or bigger, but I am making changes one thing at a time.

Matlock

Wow! Quite a relationship ya got goin' there :->. Thank you.
 
All,
I wanted to post some further information on the SCSI2SD interface. Specifically, I enlarged the disk image on one of my sd cards to RA92 size (1.4 GB) and formatted it for RSX11M+ V4.6. Below are the steps that were required:

sim> att rq3 -f simh ra92.dsk
RQ3: creating new file
sim> attach rq3 ra92.dsk
sim> sho rq3
RQ3 1505MB, attached to ra92.dsk, write enabled
RA92, autosize, SIMH format

sim> dir *.dsk
Directory of /home/mark/RSX/Yoda

04/05/2012 09:42 PM 10,478,080 RL02_1.dsk
08/09/2014 07:01 PM 1,505,766,912 ra92.dsk
08/11/2013 09:22 PM 159,350,784 rsx11mp1170.dsk
08/18/2013 10:00 PM 159,350,784 rsx11mpbl87.dsk
07/30/2014 10:29 PM 10,485,760 tcpip.dsk
5 File(s) 1,845,432,320 bytes
0 Dir(s)

(Now fire up RSX, so if you used ^e to get to the sim> use C to get back to RSX)

>ALL DU3:
>MOU DU3:/FOR
>BAD DU3: /LI
BAD -- DU3: Total bad blocks= 0.

(Note: On a 3.4Ghz i7 iMac with SSD running Ubuntu under VMware I saw peaks of 4,000 I/Os per second in Simh. It is worth doing the BAD operation under Simh)

>INI DU3: "BIGDISK" /VI

** Volume information for DU3: **

Label = BIGDISK
/Bad = [Auto]
/Cha = []
/Ext = 5.
/Fpro = [RWED,RWED,RWED,R]
/Indx = Mid
/Inf = 51699.
/Lru = 3.
/Mxf = 65500.
/Pro = [RWED,RWED,RWED,RWED]
/Uic = [1,1]
/Win = 7.
/Clf = 1.

Theoretical maximum files = 65500.

WARNING -- This volume is not backwards compatible

>DMO DU3:
DMO -- TT0: dismounted from DU3: *** Final dismount initiated ***
08:59:41 *** DU3: -- Dismount complete
>DEA DU3:
>MOU DU3:/OVR/PUB/VI
Volume Information
Class: Files-11
Device: DU03
Volume label:BIGDISK
Pack serial: 00000001237
Owner: [1,1]
Protection: [RWCD,RWCD,RWCD,RWCD]
Default: [RWED,RWED,RWED,R]
Processor: F11ACP
>PIP DU3:/FR

DU3: has 2888507. blocks free, 52444. blocks used out of 2940951.
Largest contiguous space = 1470473. blocks
65493. file headers are free, 7. headers used out of 65500.

(Shut down RSX and copy the ra92.dsk to the sd card on your Linux or Mac system. I found an old 2 GB one that was perfect to hold the 1.5 GB RA92 image)

$ ls -lh ra92.dsk
-rw-r--r--@ 1 markmatlock staff 1.4G Aug 9 20:49 ra92.dsk
$ dd if=ra92.dsk of=/dev/disk2 bs=512
2940951+0 records in
2940951+0 records out
1505766912 bytes transferred in 1352.950315 secs (1112951 bytes/sec)
$ ./scsi2sd-config --blocks=2940951 --prod-id=RA92
SCSI2SD Configuration Utility.
Copyright (C) 2013 Michael McMaster <michael@codesrc.com>

USB device parameters
Vendor ID: 0x04B4
Product ID: 0x1337
Device Found
Firmware Version: 3.5.2

Saving configuration... Done.

Current Device Settings:
SCSI ID: 1
Vendor: " codesrc"
Product ID: "RA92 "
Revision: " 3.4"

Parity Checking: enabled
Unit Attention Condition: enabled
Bytes per sector: 512
Maximum Size: 1.40GB (2940951 sectors)

Now the card is copied, the size is set correctly in the SCSI2SD system and my Emulex UC07 booted the system disk fine and found this bigger disk image perfectly. I could mount it in RSX on the real PDP-11/83 and now I think I have enough space to hold all the DECUS SIG tape files on virtual disks on this big drive.

Matlock
 
If one were to create say a 256 Byte Sector 'drive' on the SD card, how could one copy or back this up on a contemporary system as 256 Byte Sector support appears non-existent, even in Linux / OS X?

If you used Simh (assuming Simh emulated the computer you wanted) to create the 256 byte sector drive in a disk image file, you should be able to copy the disk image to an sd card under linux with:

$ dd if=simh256byte.dsk of=/dev/disk2 bs=256

where /dev/disk2/ is the linux name for the sd card

The SCSI2SD device can handle other sector sizes than 512 but the question I would have is whether the SCSI controller you connect to is capable? If it is original hardware is expecting a SCSI 256 byte sector then I would think it would work.

I've been wondering whether 1024 byte sectors were ever used by any PDP-11 or PDP-11 operating system?

Mark
 
If you used Simh (assuming Simh emulated the computer you wanted) to create the 256 byte sector drive in a disk image file, you should be able to copy the disk image to an sd card under linux with:

$ dd if=simh256byte.dsk of=/dev/disk2 bs=256

where /dev/disk2/ is the linux name for the sd card

While this would work, it might be very slow. It would be quicker to use a larger block size that is a multiple of 256 to take advantage of buffering.

$ dd if=simh256byte.dsk of=/dev/disk2 bs=64k

The SCSI2SD device can handle other sector sizes than 512 but the question I would have is whether the SCSI controller you connect to is capable? If it is original hardware is expecting a SCSI 256 byte sector then I would think it would work.

SCSI controllers have to be able to transfer data with byte granularity, so unless the controller hardware itself was built strangely or the firmware/driver for it was exceedingly inflexible, this should not be a problem. Typically it is the target device that imposes the limitations, either through the SCSI command set version it understands or due to the underlying storage medium requirements.
 
Guys, this is awesome. I bought two sd2scsi pcbs and need to get them put together.

Question, what size/brand of SD cards are working well in your systems? I know with the Raspberry pi's some cards work better than others, and some not at all.

How do the speeds compare to a real drive?
 
I bought several cheap SanDisk 2GB microSD cards so I could quickly change disks to run different operating systems. I've also used 8 GB cards from several vendors with no problems, but I wanted several 2GB ones since the largest disks RSX11M+ can handle are around 2GB.

The I/O speeds I've seen under RSX with the Emulex UC07 is around 550 KBytes/sec which is close to the speeds of SCSI hard disks of that time. This is certainly faster than the RL02s and RK07s that I started on. Under RSX11M+, turning disk caching on if you have plenty of memory to save directory I/Os. Also, the RSX11M+ V4.6 virtual disks and virtual tapes to Files-11 disk image files is useful when you have a very large microSD based RA92.

Good Luck,
Matlock
 
Cool! I'll bop down to the store and grab a 2 or 4 gig SD card.

I got my two boards soldered together over the weekend and the firmware loaded this evening and everything appears to be good. The 100pnf QFP was a joy so solder... :stern: But other than that things went together well.

len


I bought several cheap SanDisk 2GB microSD cards so I could quickly change disks to run different operating systems. I've also used 8 GB cards from several vendors with no problems, but I wanted several 2GB ones since the largest disks RSX11M+ can handle are around 2GB.

The I/O speeds I've seen under RSX with the Emulex UC07 is around 550 KBytes/sec which is close to the speeds of SCSI hard disks of that time. This is certainly faster than the RL02s and RK07s that I started on. Under RSX11M+, turning disk caching on if you have plenty of memory to save directory I/Os. Also, the RSX11M+ V4.6 virtual disks and virtual tapes to Files-11 disk image files is useful when you have a very large microSD based RA92.

Good Luck,
Matlock
 
Cool! I'll bop down to the store and grab a 2 or 4 gig SD card.

I got my two boards soldered together over the weekend and the firmware loaded this evening and everything appears to be good. The 100pnf QFP was a joy so solder... :stern: But other than that things went together well.

len

That's what I need to do too. Get a few smaller SD cards.
 
Hi, I've successfully used a SCSI2SD to emulate an RZ26L to boot OpenVMS 7.3 on a VAXstation 4000/90. However, when I try to install VMS 5.5-2H4 it doesn't work. Does any one have any suggestions as to why that might be? Thanks, Mark.
 
Hi, I've successfully used a SCSI2SD to emulate an RZ26L to boot OpenVMS 7.3 on a VAXstation 4000/90. However, when I try to install VMS 5.5-2H4 it doesn't work. Does any one have any suggestions as to why that might be? Thanks, Mark.

Got my 8GB SD card and the micro-USB cable for power and config. Set up my first SD as the same
size as an RA92. On another note the RA92 won't boot. It spins up fine, and the UDA50 shows normal.
May be a cable issue so trying to figure it out. I may have a bad SDI cable.
 
Got my 8GB SD card and the micro-USB cable for power and config. Set up my first SD as the same
size as an RA92. On another note the RA92 won't boot. It spins up fine, and the UDA50 shows normal.
May be a cable issue so trying to figure it out. I may have a bad SDI cable.
Well, I upgraded the firmware using the tool. That worked fine. Copied the RA92 image from
Simh to my Linux box and used DD to write to the SCSI2SD. It attempts to boot, but gets
and exception. The image still boots fine with Simh. So I am not sure what's wrong just yet.
 
Last edited:
Well, I upgraded the firmware using the tool. That worked fine. Copied the RA92 image from
Simh to my Linux box and used DD to write to the SCSI2SD. It attempts to boot, but gets
and exception. The image still boots fine with Simh. So I am not sure what's wrong just yet.

This post did not show up from earlier. Sorry if it duplicates. I tried an obvious test.
Copied my BSD 2.11 Simh disk file to the SCSI2SD and it boots fine. So now I am
a loss of why RSTS tries to boot and then traps to 4.
 
RSTS/E has a 2gb size limitation on disk volumes.

With an 8gb SD card, you will need to use the controller firmware
to partition the drive into at least 4 separately emulated drives.

More specifically, I seem to recall that
the emulation had to be a few LBN's less than 2gb.
 
RSTS/E has a 2gb size limitation on disk volumes.

With an 8gb SD card, you will need to use the controller firmware
to partition the drive into at least 4 separately emulated drives.

More specifically, I seem to recall that
the emulation had to be a few LBN's less than 2gb.
I originally set it up with the blocksize specified in the RA92 service
manual at 2,942,849. That should equate to 1.506GB (with block
at 512 bytes each), but that
failed also in the same manner. Yes, that would waste 3/4 of the
SD card. I didn't see anything smaller where I bought it. Did I
calculate this wrong or set it wrong? Since it doesn't even get
past the bootstrap it's hard to determine what fails.
 
I originally set it up with the blocksize specified in the RA92 service
manual at 2,942,849. That should equate to 1.506GB (with block
at 512 bytes each), but that
failed also in the same manner. Yes, that would waste 3/4 of the
SD card. I didn't see anything smaller where I bought it. Did I
calculate this wrong or set it wrong? Since it doesn't even get
past the bootstrap it's hard to determine what fails.

I think I see the error in my ways. I didn't read the last bit of the
SCSI2SD howto to correctly set the block size. I am trying something
that should work.
 
I think I see the error in my ways. I didn't read the last bit of the
SCSI2SD howto to correctly set the block size. I am trying something
that should work.

Well, that didn't work. I made the partition just under 2GB. I also did a chsum of
the original Simh file and the transferred to my Linux box. Matches so it copied
Ok and matches in size. Guess RSTS doesn't want to be run on my 11/84.
I could try overwriting my one 2GB SCSI drive, but I don't want to lose my
BSD disk. I have no other 50 pin SCSI drives that are small.
 
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