• Please review our updated Terms and Rules here

Macintosh IIfx LUN capacity

M

maxfli

Experienced Member
Joined
Oct 20, 2012
Messages
246
I know that the limit for physical scsi device is 7, but if I’m using bluescsi I can breakup the sd card into separate partitions, how many can this machine or OS handle?
 
A partition is not a LUN.
Each LUN acts as a separate disk with it's own partition map.
I don't know how many LUNs and partitions per LUN classic Mac OS supports.

I googled this: "Does BlueSCSI support multiple LUNs for a single SCSI device ID?"
Google AI says BlueSCSI connected to 8 bit SCSI can support 8 LUNs per SCSI ID.

More notes:
https://68kmla.org/bb/threads/connecting-multiple-disks-to-one-scsi-id.45155

I guess the best way to find out is to do some tests.
 
Does the IIfx support LUNs? It exists with Quadra 840av or SCSI Manager 4.3. I think you need System 7.5 to get SCSI Manager 4.3 on a IIfx.

Although BlueSCSI supports specifying a LUN, it might not support a LUN that is not zero?
https://bluescsi.com/docs/Usage
 
If you can find an emulator that emulates a Mac IIfx and supports emulating SCSI devices with multiple LUNs, then that might be a good way to test OS support for multiple LUNs.
Check Snow or MAME or QEMU. If they don't have support for emulating SCSI devices with multiple LUNs, it might be easy to add such support if they emulate everything else in SCSI sufficiently enough.
 
What is your ultimate goal, what is the intend use of the many drives?
Overcoming the 2gb partition (volume) size limit of system 6 and 7; they each more than 150 volumes per drive. A 300gb disk image could be sliced up into 2gb chunks. Cycling images is supported by bluescsi for removable media. Network shares are also available under mac os.
HFS KB https://www.savagetaylor.com/TIL/KB008647.html
 
I would like to host a web site that serves photos. So I’ll need quite a bit of storage, not exactly sure how much.
 
You must log in or register to reply here.
Back
Top