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Differential SCSI drives (HVD?)

kb2syd

Veteran Member
Joined
Mar 7, 2005
Messages
1,758
Location
Wantage, NJ
I have 3 or 4 HP SCSI drives that I think are HVD. Since the manuals don't specifically say they're high voltage, does anyone know a way to tell?

They're C2490a-012 drives.

Kelly
 

Chuck(G)

25k Member
Joined
Jan 11, 2007
Messages
38,870
Location
Pacific Northwest, USA
Those 2 GB HP drives had lots of options.

Easy way to tell HVD from LVD is to apply power to the drive and put a voltmeter between the DIFFSENSE pin and ground. If the reading is less than about 0.5V, the device is SE. If it's more than 0.5 but less than 2.0V, it's LVD; if it's more than 2.0V, it's HVD.
 

mark66j

Experienced Member
Joined
Apr 12, 2010
Messages
192
Location
Arlington, MA, USA
I think I have an old, but never really used, HVD controller card at home, bought by mistake when I wanted an LVD one, it is any use.
 

kb2syd

Veteran Member
Joined
Mar 7, 2005
Messages
1,758
Location
Wantage, NJ
They went to disk drive heaven (or hell) yesterday. I just had too much stuff. Between the A/C fins, electric motors, power cords, broken or unusable hard drives, motherboards, memory, old laptops, and CPUs, I recycled more than 500 pounds. Tomorrow is a trip to the local landfill to get rid of even more stuff.

I wasn't getting offers (not even offers to come pick stuff up for free) on anything other than a couple of the bigger SCSI drives (which I will pack up this week for shipping). I kept every hard drive that I could test as good and I still have more than 30 IDE and SCSI drives laying around the basement. That's not counting the 10 ST-406/ST-512 interface drives I have.
 

Unknown_K

Veteran Member
Joined
Sep 11, 2003
Messages
8,507
Location
Ohio/USA
They went to disk drive heaven (or hell) yesterday. I just had too much stuff. Between the A/C fins, electric motors, power cords, broken or unusable hard drives, motherboards, memory, old laptops, and CPUs, I recycled more than 500 pounds. Tomorrow is a trip to the local landfill to get rid of even more stuff.

I wasn't getting offers (not even offers to come pick stuff up for free) on anything other than a couple of the bigger SCSI drives (which I will pack up this week for shipping). I kept every hard drive that I could test as good and I still have more than 30 IDE and SCSI drives laying around the basement. That's not counting the 10 ST-406/ST-512 interface drives I have.

Let me know if you have any Thinkpad parts.
 
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