Date: Sun, 01 Mar 1998 15:59:14 -0800 From: Mike Smith <mike@smith.net.au> To: Andreas Klemm <andreas@klemm.gtn.com> Cc: Mike Smith <mike@smith.net.au>, scsi@FreeBSD.ORG Subject: Re: timeout when formatting 9GB Barracuda, scsi errors is missing time Message-ID: <199803012359.PAA10350@dingo.cdrom.com> In-Reply-To: Your message of "Sun, 01 Mar 1998 23:06:52 %2B0100." <19980301230652.39518@klemm.gtn.com>
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> On Sun, Mar 01, 1998 at 01:21:48PM -0800, Mike Smith wrote: > > > > > > > > DO NOT let this go. If you do, that soft (ECC recoverable) error will > > > > likely turn into a hard error and you will lose the data. > > > > > > Ok, thanks ! But what's strange for me is, that I preformatted the > > > disk 12 hours ago ... And then this, hmmm ... > > > > Er, rule 1: Do not perform a SCSI format on a disk unless you > > absolutely *MUST*. Disks are formatted at the factory under optimal > > conditions. You can't reproduce those anywhere else. > > This rule says > a) You don't have optimal conditions like those in the factory > b) the factory doesn't have the conditions that you have ... > > So ... perhaps immediately jump to rule 2 ?! No. Conditions at the factory include an extremely stable physical platform, minimal EMI, clean power, long-term thermal stability. These result in a "quality of format" which cannot be achieved under other conditions. In addition, the format conditions at the factory result in a format which is suited to the widest range of operating conditions. > > Also, your error is not uncommon; if the media has lost some retention > > it will be OK during the format, but hours later the data will be gone. > > Ok, but who has optimal conditions, so I'd vote for doing a > preformat locally and because of things like transport and such. > Or ? No. I'll say it again; unless you *must* reformat, don't. Reformatting will degrade the quality of the entire disk. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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