Date: Thu, 15 Jun 1995 19:08:41 +0200 From: esser@zpr.uni-koeln.de (Stefan Esser) To: Michael Paepcke <paepcke@arcway.snafu.de> Cc: hackers@freebsd.org Subject: Re: Medium error Message-ID: <199506151708.AA28672@FileServ1.MI.Uni-Koeln.DE> In-Reply-To: Michael Paepcke <paepcke@arcway.snafu.de> "Medium error" (Jun 15, 17:37)
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On Jun 15, 17:37, Michael Paepcke wrote: } Subject: Medium error } : What do we have: } : A P90-asus with NCR controller with a quantum 2.1 Empire as sd2. } : } : And this baby is generating a medium error on just one location. } : Jun 13 22:19:50 iaehv kernel: sd2(ncr0:2:0): medium error, info = 2817606 (decimal) } : } : The funny (??) thing is that this cause I/O errors in INN in serveral spool } : directories. } } } I have the same problems with my Quantum Empire 1.4G and NCR53c810 } periodically ... and after reformating it on an Apple Mac Computer } there are no more or no less *real* "Bad Blocks" on my disk. A medium error isn't neccessarily permanent. And if this error condition is signaled by the drive and the driver is able to return the block number to the generic SCSI code, as shown in the message above, then there is nothing wrong with the controller or driver, just with some sector on the disk! } Quantum Lables some of his Harddisks as "SCSI-III" ... and } this sort of Disks seems to make trouble with FreeBSD & NCR. No. The SCSI-III is no problem, since Quantum uses it just for marketing reasons. There is no "SCSI-III", yet. They offer a few technical details that will be part of the next SCSI standard, but that's no different from all the other drive manufacturers ... } Ask Stefan Esser (NCR driver dev.) for more informations. Can't provide you with more information. The command options to the "scsi" command that enable the automatic remapping of bad sectors has been posted to this list already. It generally is a good thing to have the drive replace bad spots early (i.e. before any data has been lost). STefan
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