Date: Thu, 28 Jul 2005 02:26:40 +0100 From: ".VWV." <victorvittorivonwiktow@interfree.it> To: <freebsd-questions@freebsd.org> Subject: Re: certance DAT Message-ID: <006e01c59313$6a8acc30$98edfea9@workstation> References: <007b01c59251$925c5ca0$98edfea9@workstation> <42E6FCC5.8070309@mac.com> <6.1.0.6.2.20050726211444.18e82a00@cobalt.antimatter.net> <000901c59308$5710fe00$98edfea9@workstation> <20050728003523.GA81656@dan.emsphone.com>
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I am looking for a high-speed tape drive, mainly for use of incremental dump of the FreeBSD filesystem [with complicated custom X environment, but nothing more], and of incremental tar of the Windows, divided into something similar of a unix partitions' layout [with complicated custom graphical engines, but nothing more]. The most heavy backup of each system, is therefore no bigger then 5 GB. Hard disk backups are not possible, because I cannot write to the NTFS backup disk of the Disgusting Operating System. ---- Original Message ---- From: "Dan Nelson" <dnelson@allantgroup.com> To: ".VWV." <victorvittorivonwiktow@interfree.it> Cc: <freebsd-questions@freebsd.org> Sent: Thursday, 28 July, 2005 01:35 Subject: Re: certance DAT > In the last episode (Jul 28), .VWV. said: >> I have compared some features among different current tape drive >> standards. It seems DLT and LTO Ultrium 2 cartridges are more >> expensive then DAT 72 and VXA 2 ones. I have not found yet a >> criterion useful to choose the most reliable standard. Any suggestion >> could be useful. I'll need either to dump or to tar. > > They are definitely more expensive (as are the drives), but they are > also higher capacity and can write a lot faster than DAT. If you have > less than 36gb of data to back up at any one time and you don't mind a > backup taking 3 hours (if done at night, for example), then DAT may be > perfect for you. Once your backups start exceeding your backup window > or take more than one tape, you can look at more expensive drives (or > an autoloader). An LTO-2 drive can fill a 200gb tape in the same 3 > hour period. If you have compressible data, double the tape > capacities (to 72gb and 400gb). If you need more than 400gb native > on a tape, get an LTO-3 :) > > Reliability reports are too dependant on local variables (how often is > a tape reused, how are they stored, how clean is your server room etc) > so I would only trust comparitive reports from people with multiple > drive types at one location.
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