Date: Sun, 7 May 1995 19:37:44 +1000 (EST) From: michael butler <imb@asstdc.scgt.oz.au> To: dufault@hda.com (Peter Dufault) Cc: current@FreeBSD.org Subject: Re: SCSI drive auto error reallocation Message-ID: <199505070937.TAA28473@asstdc.scgt.oz.au> In-Reply-To: <199505061316.JAA15015@hda.com> from "Peter Dufault" at May 6, 95 09:16:23 am
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Peter Dufault writes: > The newest version of "scsi" lets you edit your mode pages. Now that I've > added that you may want to check to see if you have automatic read and > write reallocation enabled. I have three SCSI drives and none did. Nor did mine .. however, I can understand wishing to dynamically reallocate on write failures, but reads ? > The command is "scsi -f /dev/rsd?c -m 1" to dump mode page 1 .. On an ISA machine (running -current, 7/7/95, BusLogic 542B, OLD firmware) this can cause .. May 7 17:46:50 asstdc /kernel: aha0: DMA beyond end Of ISA May 7 17:46:50 asstdc /kernel: biodone: buffer already done .. needless to say the ioctl fails. Not fatal, but interesting. > > hda# scsi -f /dev/rsd2c -m 1 > > AWRE (Auto Write Reallocation Enbld): 1 > > ARRE (Auto Read Reallocation Enbld): 1 > > TB (Transfer Block): 1 > > RC (Read Continuous): 0 > > EER (Enable Early Recovery): 1 > > PER (Post Error): 0 > > DTE (Disable Transfer on Error): 0 > > DCR (Disable Correction): 0 > > Read Retry Count: 18 > > Correction Span: 11 > > Head Offset Count: 0 > > Data Strobe Offset Count: 0 > > Write Retry Count: 18 > > Recovery Time Limit: 0 > If AWRE and ARRE are 0 you want to run the command with the "-e -P 3" > switches to permanently enable read and write reallocation. Could someone please explain 'TB' and 'EER' which seem to differ from teh above on a drive here ? michael
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