Date: Sun, 20 Dec 1998 11:16:22 +1030 From: Greg Lehey <grog@lemis.com> To: Gary Kline <kline@tera.com>, David Kelly <dkelly@hiwaay.net> Cc: questions@FreeBSD.ORG Subject: Re: 4mm tape drive question Message-ID: <19981220111622.U24125@freebie.lemis.com> In-Reply-To: <199812191846.KAA21155@athena.tera.com>; from Gary Kline on Sat, Dec 19, 1998 at 10:46:05AM -0800 References: <199812190635.AAA10607@n4hhe.ampr.org> <199812191846.KAA21155@athena.tera.com>
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On Saturday, 19 December 1998 at 10:46:05 -0800, Gary Kline wrote: > According to David Kelly: >> Gary Kline writes: >>> >>> >>> When I bought my 4mm tape drive in '95, 2GB was a _lot_ >>> of storage; but since I've just added a 9G drive to >>> my main system, it's time to consider the backups. >>> >>> My question: can I use a cassette larger than 90meter >>> ones I've been using? (And why?) >> >> Don't know what brand and model 4mm drive you have so we can't answer. >> But if you have a DDS-1 drive you are limited to the 60m and 90m tapes. >> All but the earliest DDS drives are smart enough to know what tape you >> put it, or at least smart enough to know if they were designed to use >> the tape you inserted. >> >> 120m DDS-2 tapes "only" do a native 4G. But only on DDS-2 drives. >> >> 125m DDS-3 tapes do a native 12G. I wonder if these tapes are really 5m >> longer than DDS-2 or somebody in marketing just fudged the numbers? >> >> A good solution for now would be to use the -z option in FreeBSD's GNU >> tar. You'll get some useful compression if you use tar. > > I had the box custom built and have prob'ly lost the docs > after 40+ months, so I'm betting that the 4mm was the cheapest > (even at $550) that the place could use. Well, dmesg is your friend. >> Otherwise partition the drive in chunks small enough to fit on your >> tapes in order to enforce a segregation for backup. > > I followed Greg L's advice here. The entire 9G will be /usr. Hmm. I did modify my suggestions to say that it makes sense to not have file systems which can't be backed up on a single tape. Greg -- See complete headers for address, home page 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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