Date: Thu, 21 May 1998 11:27:52 -0500 (CDT) From: David Kelly <dkelly@fly.HiWAAY.net> To: freebsd-scsi@FreeBSD.ORG, gkoller@cs.vu.nl Subject: Re: Defect list (camcontrol) Message-ID: <199805211627.LAA26140@fly.HiWAAY.net>
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Guido Kollerie <gkoller@cs.vu.nl> writes: > > $ camcontrol -d -f phys > Got 239 defects. > > This seems to be a little to much. I had expected a few remapped blocks > but not 239! Is this something I should worry about? Not if they are factory defects. If they are grown defects then its time to worry. As a part of our standard procedures at work we print the defect list of each drive, by "manufacturer's" and "grown", prior to turning it over to users. 50 defects is normal-to-low. 200 is about average. 700 to 1000 is not unusual. All in the manufacturer's defect list. The exception was Conner SCSI HD's. Was convinced the firmware was lying because I never saw a Conner SCSI HD that would admit to having bad blocks from the factory. A quick check of systems shows 426 factory defects on the 4G IBM drive shipped OEM on the SGI O2 behind me. You know the drive maintains a bunch of spares? Am not sure how many. Remapped defects do not subtract from the drive's total capacity. At least not until the spares run out. And by then the drive is ready for the scrap pile. -- David Kelly N4HHE, dkelly@hiwaay.net (hm) ====================================================================== The human mind ordinarily operates at only ten percent of its capacity -- the rest is overhead for the operating system. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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