Date: Thu, 30 Jan 2003 16:03:48 -0700 From: "Kenneth D. Merry" <ken@kdm.org> To: joe mcguckin <joe@via.net> Cc: hardware@FreeBSD.ORG Subject: Re: DLT tape not streaming Message-ID: <20030130160348.A67127@panzer.kdm.org> In-Reply-To: <BA5EEC45.1F66F%joe@via.net>; from joe@via.net on Thu, Jan 30, 2003 at 02:50:45PM -0800 References: <BA5EEC45.1F66F%joe@via.net>
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On Thu, Jan 30, 2003 at 14:50:45 -0800, joe mcguckin wrote: > Our DLT-7000 tape drive does not stream continuously - there's quite a bit > of shuttling back and forth. > > Are there any SCSI parameters I can tweak to improve it's performance? What are you using to do backups? dump(8) is notoriously inefficient; I would recommend using Matt Dillon's caching tweaks to dump (use the -C option). They'll probably speed things up somewhat. Another option is dumping the whole thing to a file, and then use dd to send that dump image to the tape drive. I use that technique on a number of machines. Ken -- Kenneth Merry ken@kdm.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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