Date: Wed, 24 Mar 1999 09:29:33 +1030 From: Ian Moore <imoore@hamcoll.schools.sa.edu.au> To: freebsd-questions@FreeBSD.ORG Subject: Using dump with a DAT Message-ID: <36F81CD5.C5E6AB25@hamcoll.schools.sa.edu.au>
next in thread | raw e-mail | index | archive | help
Hi, I'm trying to dump to a Seagate CTD4004R-S 4/8Gig DAT drive on a server running 2.2 STABLE & am having problems when the end of the tape is reached. Using -u does not work. I found this in the mailing list archive: > On Wed, 25 February 1998 at 16:01:21 -0600, Jason Hudgins wrote: > >>> I have a Seagate DAT that I've been dumping backups too. The DAT is > >>> supposed to have a 4 gig capacity (uncompressed) when writing to a 120m > >>> tape. Can anyone PLEASE tell me the proper density/tape length to get > >>> 4 gigs out of this thing? So far I've been using a density of 61000 and a > >>> length of 6000, which will store about 2 gigs..and works fine, but I > >>> REALLY need to get 4 gigs out of it...or at least 3. > >> > >> Try using the -a option and drop the length and density options. If your drive > >> reports EOM properly it should work just fine. > > > > I've tried that.. it doesn't work.. it just hits the end of the tape and > > the bugs out with write errors.. =( > > Unfortunately, the tape driver currently returns an I/O error > indication when it hits end of tape. They're working on it, but it's > more complicated than it appears. > > Greg > I'm wondering if this problem has been solved yet?! If not, can anyone tell me what values I should use for a 4G DAT tape (120 metres) if I don't use compression -I've tried some of the suggestions given on the mailing list archives, but keep getting 'invalid 'd' (density) value' or 'invalid 'b' (no of blocks per write) value' errors. There seem to be numerous opinions on what values to use & wether to use d & s or b & B parameters & I'm kinda confused. Cheers, -- Ian Moore Network Administrator Hamilton Secondary College To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?36F81CD5.C5E6AB25>