Date: Mon, 16 Mar 1998 18:34:26 -0800 (PST) From: Simon Shapiro <shimon@simon-shapiro.org> To: Karl Denninger <karl@mcs.net> Cc: scsi@FreeBSD.ORG Subject: Re: Any thought given to... Message-ID: <XFMail.980316183426.shimon@simon-shapiro.org> In-Reply-To: <19980316154940.13918@mcs.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On 16-Mar-98 Karl Denninger wrote: .. > Well, the place I got bit by it wasn't on the news machine (where its not > really all that big a deal). The "prophylactic" value is significant > though. If you get an error on an I/O request there is simply no reason > to > barf the *rest* of the queued I/O! That's what was going on - it wasn't > the > single request that got hosed without being retried, but literally > everything in the chain that hadn't yet made it to the RAID controller > that > was being aborted. That can be a *lot* of data; if you're unlucky you > end > up with a system that won't fsck when it comes back up. This may be a virtue of the Host Adaptor you are using. I saw some of this stuff early, but the current DPT driver rarely, if ever, exhibits that. The reasons are many and nasty, but they are there. Simon To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?XFMail.980316183426.shimon>