Date: Sat, 6 May 1995 09:16:23 -0400 (EDT) From: Peter Dufault <dufault@hda.com> To: current@FreeBSD.org Subject: SCSI drive auto error reallocation Message-ID: <199505061316.JAA15015@hda.com>
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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. The command is "scsi -f /dev/rsd?c -m 1" to dump mode page 1, and "scsi -f /dev/rsd?c -m 1 -e -P 3" to edit the page and store the changes permanently. WARNING: THIS IS A NEW COMMAND. The edit works fine for me on the three drives I have, but you may want to do it right after your backups. Three drives is not a full coverage test. I don't think reading back your mode pages can hurt things. Here is the output I get with read and write reallocation enabled: > 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. -- Peter Dufault Real Time Machine Control and Simulation HD Associates, Inc. Voice: 508 433 6936 dufault@hda.com Fax: 508 433 5267
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