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- Path: sparky!uunet!ogicse!flop.ENGR.ORST.EDU!leela!atlantis.CS.ORST.EDU!ridgwad
- From: ridgwad@atlantis.CS.ORST.EDU (Dean Ridgway)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Help on CDC Wren hard drive.
- Summary: CDC Wren hard drive not reliable.
- Message-ID: <1992Dec11.213719.9329@leela.cs.orst.edu>
- Date: 11 Dec 92 21:37:19 GMT
- Article-I.D.: leela.1992Dec11.213719.9329
- Sender: usenet@leela.cs.orst.edu (Usenet programs owner)
- Followup-To: comp.sys.amiga.hardware
- Organization: Computer Science Outreach Services - Oregon State University
- Lines: 61
- Nntp-Posting-Host: atlantis.cs.orst.edu
-
- Hello people, a friend of mine has several 5.25" format full-height CRC WREN
- 94171-344 300 meg hard drives and I am interested in buying one to put on my
- A500. We don't have any documentation on these drives, no jumper settings etc.
- All we know is they were taken out of a SUN.
-
- The drive is currently being powered off a 200 watt IBM AT supply. I am using
- a Supra SCSI interface with Series III v3.8a software. I have my Quantum P40S
- configured as SCSI 0, the CDC as SCSI 1 and a QIC tape streamer as SCSI 4.
- Operation of the Quantum and tape streamer remain normal. The tape drive is
- internally terminated and I have pulled the resistor packs off both the
- Quantum and the CDC.
-
- The CDC low/high level formats with no problem and shows only a few sectors
- mapped out as bad (right now its set as one big partition). Quarterback tools
- v1.3b can't find any bad sectors after a high level format.
-
- The problems occur during usage, occasionally the drive throws up the system
- "write error" requestor. Pressing RETRY once will continue and the file will
- CRC the same as the source. During reads from the drive it will occasionally
- put up the "read error" system requestor, pressing RETRY does no good and you
- eventually have to CANCEL (well I gave up after about seven tries). These
- errors appear to be totally random, as reading/writing the same file again
- either completes with no problems or produces DIFFERENT bad sector numbers.
-
- Sometimes along with the read/write error the drive will emit a loud WHANG
- sound. Once this happens, that sector will ALWAYS be bad after that and any
- furthur attempts to read/write that file produces another WHANG and error at
- the exact same sector number. This does not appear to be physical media damage
- because the error can be fixed by doing a "quick" format (until it happens
- again somewhere else).
-
- Since these are older drives, I have played with the mountlist MAXTRANSFER
- parameter as I thought thats what was wrong (drive getting too much data at
- once) but this does not appear to change anything.
-
- Someone once mentioned to me that older drives have a jumper for "partity
- enabled" and if that is jumpered when no other devices on the SCSI bus has it
- set there will be all kinds of weird problems. Could this be it? I rather
- doubt it since my friend is having similar experiances with trying one of
- these on his 386 box where the CDC as the only SCSI device.
-
- Any suggestions or are these drives just plain worn out?
-
- There are three different sets of jumpers. Anyone have the jumper sheet for
- this? Looking at the back of the drive...
-
- ;;;:: || PPPPP
-
- TTTTT ============================= |: TTTTT
-
- = 50-pin SCSI connector
- P power connector
- T 16-pin DIP SCSI terminator pack
- : jumper (open)
- | jumper (closed)
- ; These three jumpers are for the SCSI-ID
-
- ANY help at all would be appreciated.
-
- Dean Ridgway | FidoNet 1:357/1.103 | InterNet ridgwad@jacobs.cs.orst.edu
- | CIS 73225,512 | ridgwad@atlantis.cs.orst.edu
-