Date: Tue, 8 Oct 2002 16:43:45 -0400 From: Steve Byan <stephen_byan@maxtor.com> To: Gunther Schadow <gunther@aurora.regenstrief.org> Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: SCSI bad block remapping doesn't work!?#@$ Message-ID: <A3D68FE2-DAFE-11D6-AD22-00306548867E@maxtor.com> In-Reply-To: <3DA30E67.8000206@aurora.regenstrief.org>
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On Tuesday, October 8, 2002, at 12:57 PM, Gunther Schadow wrote: > Hi, > > I can't seem to be able to make my SCSI disk map bad blocks. Can > someone > please look over my shoulder and see what I may be doing wrong? I have > > $ uname -a > FreeBSD ... 4.4-RELEASE FreeBSD 4.4-RELEASE ... i386 > > $ camcontrol inquiry da1 > pass1: <COMPAQPC WDE4360 1.52> Fixed Direct Access SCSI-2 device > pass1: Serial Number WS7010556513 > pass1: 20.000MB/s transfers (20.000MHz, offset 15), Tagged Queueing > Enabled > I don't recognize the ID string here. Is this by any chance a Quantum or Maxtor drive? If so, I will help you get to the bottom of this. I've forgotten the details, but if I recall correctly, Quantum and Maxtor drives need to see the hard read error multiple times, with the block being overwritten each time) before reallocating, since the most likely cause of hard read errors is a transient write error (off-track write or high-fly write) rather than a grown media defect. (If you do get a grown media defect, then it's most likely that there is particulate contamination in the drive, and it will quickly experience a cascade of failures.) From your description, it sounds like you have most likely met the drive's criteria for remapping the block. If it's not one of ours, I dunno. Regards, -Steve -------- Steve Byan <stephen_byan@maxtor.com> Design Engineer Maxtor Corp. MS 1-3/E23 333 South Street Shrewsbury, MA 01545 (508) 770-3414 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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