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- From: ajc@pa.dec.com (AJ Casamento)
- Subject: Re: Fujitsu M2266S-512 on a 5000/240
- In-Reply-To: reading%uintah.cs.utah.edu@cs.utah.edu's message of 5 Nov 92 08:44:17 MST
- Message-ID: <AJC.92Nov10115725@thendara.pa.dec.com>
- Sender: news@PA.dec.com (News)
- Organization: Digital Equipment Corporation
- References: <1992Nov5.084418.22570@hellgate.utah.edu>
- Distribution: na
- Date: 10 Nov 92 11:57:25
- Lines: 69
-
-
-
-
- In article <1992Nov5.084418.22570@hellgate.utah.edu> reading%uintah.cs.utah.
- edu@cs.utah.edu (Dan Reading) writes:
-
-
-
- >> I have a fujitsu M2266SA I'm putting on a DECStation 5000/240. The
- >> drive does not spin up if attached to the DEC at power up, and the
- >> first first READ/WRITE I/O operation fails. After that it works fine.
- >> I'm sure this has something to do with the jumper settings on the
- >> drive. Maybe someone else can inform of the correct settings before I
- >> have to set down and read the manual.
-
- >> thanks in advance,
- >> Dan R.
- >> reading@cs.utah.edu
-
- Dan,
-
- I would suspect that you've got a jumper setting problem. This is not all
- to uncommon with some SCSI drives. The most likely culprit is the switch which
- is hardwiring Synchronous SCSI. The ANSI SCSI-2 spec states that a synchronous
- device be able to "negotiate" synchronous.
-
- The console code in the SCSI prom on the DEC platforms addresses the drive as
- an asynchronous device. When the operating system boots, it will negotiate with
- the devices to see if they can handle synchronous. If your disk drive is hard-
- wired as a synchronous device, it will fail at console level.
-
- You may want to try the following:
-
-
- >>> Excerpted from a previous post by:
- >>> From: grunwald@foobar.colorado.edu (Dirk Grunwald)
- >>> Date: 16 Sep 91 21:55:46 GMT
-
-
- Switch Bank CHN2:
- - open switch 1-2 (make it be SCSI-1/CCS)
- - open switch 11-12 (turn parity off)
- - open switch 15-16 (let host initiate SCSI synch mode)
-
- For some hosts, you may need to also disable the readahead cache
- (CHN9), but it seems to work on the DECstation. Bulk transfers (using
- dd & 32K blocks) are 1.2Mb/s. The Wren V gets about the same, maybe a
- little less. The Fuji has 14.5ms seek time.
-
- >>> End of excerpt
-
- I make no warranties about the above information. You may want to contact
- the folks who sold you the disk drive and ask them about it. But, this has
- worked for a number of folks.
-
- I hope that helps.
-
- Thanx,
- AJ
-
-
- **********************************************************************
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- * ajc@pa.dec.com *
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