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- Path: sparky!uunet!stanford.edu!agate!ucbvax!PAN.SSEC.HONEYWELL.COM!thompson
- From: thompson@PAN.SSEC.HONEYWELL.COM (jt -- John Thompson)
- Newsgroups: comp.sys.apollo
- Subject: re: Tape Archive Capability
- Message-ID: <199211122124.AA17798@pan.ssec.honeywell.com>
- Date: 12 Nov 92 21:24:37 GMT
- Sender: daemon@ucbvax.BERKELEY.EDU
- Distribution: world
- Organization: The Internet
- Lines: 69
-
-
-
- > I am interested in any experience DOMAIN users may have with 8mm and 4mm tape
- > for archiving user data files.
- >
- > Two options we are looking at are
- > 8mm 5.GB tape
- > 4mm data with compression subsystem.
- >
- > My questions are:
- >
- > 1) Does anyone have experience with using these for WBAKing/TARing
- > user files? I am particularly interested in the 4mm with
- > compression because of cost and claimed capacity (8GB).
- > I would be curious if anyone using this has measured
- > how much they actually get.
- >
- > 2) Experience with TFI as a vendor.
- >
- > 3) Other recommended sources.
- >
- > 4) Other recommended options for archiving.
-
- A1) I have used the "normal" 2.3GB 8mm drives for doing archives via tar, wbak,
- and Omniback (HP/Apollo product). I haven't tried any compressed drives,
- because, frankly, I'm too shocked by fitting 2 BILLION bytes on, in essense,
- a thing the size of a audio cassette tape. That much data should take up
- space, and require climate control, and make the building settle, and ....
-
- A2) Never heard of them before, but that may not mean a thing.
-
- A3) Check out the FAQ (recently posted, or email me if you can't find it). It's
- maintained over in the Netherlands, but I can't remember the address....
- Keep in mind that, unless things have changed recently, you're not buying
- a different vendor's 8mm tape drive. Last I was aware, all the 8mm drives
- were made by Exabyte. You may get a different enclosure, and you may get
- a different manual, and you may get a different warranty, and you may very
- well get different support/knowledge, but you will get the same drive.
- I believe that this is _NOT_ the case w/ the 4mm drives, but I don't know
- if there's any significant difference there. I suspect that TFI, and most
- vendors, get their h/w from a small number of actual manufacturers.
-
- A4) Are you talking hardware or software options?
- HW: 8mm and 4mm are probably the best tape options, but if you need fast,
- quasi-online storage, maybe a r/w-optical jukebox is for you. Even
- with the 4mm or 8mm drives, consider autoloaders and carousels if
- you're going to try and do large, automated, backups/restores.
- SW: I think TAR sucks. Omniback from HP/Apollo is, IMHO, a fine product,
- and I like it a lot. It's being expanded to support Suns (client side
- only) RealSoonNow. Wbak is great if you plan on being stuck on Domain
- forever. HP has committed to an rbak product on HP-UX to allow you to
- RESTORE your old tapes, but you won't be able to use it to back up.
- Several vendors have backup solutions; I haven't used them though.
-
- -- jt --
- John Thompson
- Senior Engineer / Sys-Admin
- Honeywell, SSEC
- Plymouth, MN 55441
- thompson@pan.ssec.honeywell.com
-
- If you're not part of the solution, you're part of the precipitate.
- *************************************************************************
- * This e-mail correspondence is a work of fiction. Any similarity *
- * between the views presented and actual views, personal or corporate, *
- * living, dead, or still to be conceived, is pure coincidence. *
- *************************************************************************
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