Date: Sat, 7 Mar 1998 09:31:09 -0800 (PST) From: Julian Stacey <jhs> To: scsi@FreeBSD.ORG Cc: me@FreeBSD.ORG, gj@FreeBSD.ORG Message-ID: <199803071731.JAA27263@hub.freebsd.org>
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Hi SCSI people, Is it necessary to format a 4.3G SCSI disc on the same system + controller ncr0 <ncr 53c810a fast10 scsi> rev 18 int a irq 10 on pci0:10 that the disc will later run FreeBSD on ? I believe it doesnt' matter which SCSI controller you use to format ? (so long as it issues a sensible sequence of format commands, & does actually format, I think the last of the `format with the controller you will run with' dependencies was back with the ST506 ? I'd agree to `It'd do no harm, why not if you can', but - My box with the NCR SCSI controller has no DOS partition, - The ASUS SCSI controller floppies are for a dos base (& multiple flops, so squeezing down to 1 DOS boot flop would be difficult). - An adjacent system with Adaptec 1542c formats conveniently from bios Ctl. A So I just used the target PC's power, & cross hitched a scsi ribbon to format. It worked fine twice before, only got some bad sectors months later. I bought my first "IBM DCAS-34330 S61A" type 0 fixed SCSI 2 1997.08.26, it developed bad sectors 1997.10.09, when I bought another "IBM DCAS-34330 S65A" type 0 fixed SCSI 2 to rescue the data to, when I reformatted both discs using the 1542C (I think). The old S61A is now in a 3rd system (1542B), running fine, neither are warm, both have power supplies with good DVM volt readings (but I haven't oscilloscoped the power rail for noise , but yes connectors are tight).. As this was the 2nd set of bad sectors with the S65A, I took it back to the dealer (wasted time, Koenig in Munich Not reccomended !), I'd now like to research deeper, & list both tables of bad sectors & see how full they are, how many tracks dedicated to free sectors etc, & monitor the count regularly, on both discs, & if there's a systematic failure mode on both discs, to ignore the hostile Wintel oriented dealer, & report failure direct to someone at www.storage.ibm.com, if these discs are exhibing some batch oriented bad sector growth symptoms. I read man [0-9] scsi /usr/share/misc/scsi_modes /usr/include/scsi.h & happen to have a Seagate SCSI booklet, but it's heavy going, & a few more example commands would help both `man scsi` & me. BTW on my 2.2.5 system with the NCR controller, (with root on wd0) I did: scsi -f /dev/rsd0c -m 1 -e -P 3 AWRE (Auto Write Reallocation Enbld): 1 ARRE (Auto Read Reallocation Enbld): 1 [ so the disc _should_ be self correcting, but obviously isn't, is running out of sectors ] TB (Transfer Block): 0 RC (Read Continuous): 0 PER (Post Error): 0 DTE (Disable Transfer on Error): 0 DCR (Disable Correction): 0 Read Retry Count: 1 Correction Span: 0 Write Retry Count: 1 scsi -f /dev/rsd0c -c "4 0 0 0 0 0" SCIOCCOMMAND ioctl: Command accepted. return status 1 (Command Timeout) after 2000 msCommand out (6 of 6): 04 00 00 00 00 00 No sense sent. [ Don't know what's wrong Then I gave up & formatted with 1542C (with no problem). So I'll now rebuild with this drive, & in another few months I expect it will develop bad sectors again ..... Any suggestions, sample scsi systax ? PS I'm fresh subscribed to scsi@, but no traffic yet, so a cc: jhs@freebsd.org would make sure I see your reply ... Thanks ! Julian Julian H. Stacey <jhs@freebsd.org> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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