Date: Sat, 23 May 1998 17:51:10 +0930 From: Greg Lehey <grog@lemis.com> To: Jim Van Baalen <vansax@mail.websidestory.com>, questions@FreeBSD.ORG Subject: Re: rdump question Message-ID: <19980523175110.O317@freebie.lemis.com> In-Reply-To: <Pine.BSI.3.96.980522091728.9167A-100000@mail.websidestory.com>; from Jim Van Baalen on Fri, May 22, 1998 at 09:56:05AM -0700 References: <Pine.BSI.3.96.980522091728.9167A-100000@mail.websidestory.com>
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On Fri, 22 May 1998 at 9:56:05 -0700, Jim Van Baalen wrote: > I have been dumping several machines to local 8mm drives. Dump writes to > these drives at about 4mbps. What kind of drives are these? Most Exabytes maxe out at about 1 MB/s. > To conserve resources I have been trying to dump to the same model > drive on a remote machine using the <hostname>: notation. When I do > this dump writes at about .5mbps. Both machines are on dedicated > 10bt switched connections and dump is definitely not taxing the 10bt > connection. Both machines are 266Mhz which I have seen easily fill a > switched 10bt connection. Neither machine is working particulary > hard independent of the dump. I have tried replacing the 3COM 3C905 > Fast Etherlink XL PCI with the Intel EtherExpress Pro 10/100B > because I have had NFS problems while using the 3COM card. It > appears the the default block size for dump is 1024 (as opposed to > 8192 for NFS) so it I didn't think this would work, but I had the > cards... With typical disk capacities of 4-9Gb dumping a drive at > this speed can take over a day. > > Is this expected behavior? I'd expect that of non-compressing dumps. What kind of tape hardware are you using? Are you compressing? Greg -- See complete headers for address and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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