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- Newsgroups: comp.unix.bsd
- Path: sparky!uunet!mcsun!Germany.EU.net!news.netmbx.de!zrz.tu-berlin.de!math.fu-berlin.de!informatik.tu-muenchen.de!rommel
- From: rommel@Informatik.TU-Muenchen.DE (Kai-Uwe Rommel)
- Subject: Re: Choice of SCSI tape drive for 386bsd (longish blater)
- References: <1992Aug19.112710.25394@olymp.informatik.uni-bonn.de> <1574@hcshh.hcs.de> <TMH.92Aug20215543@doppel.first.gmd.de>
- Sender: news@Informatik.TU-Muenchen.DE (USENET Newssystem)
- Organization: Technische Universitaet Muenchen, Germany
- Date: Thu, 20 Aug 1992 22:36:45 GMT
- Message-ID: <1992Aug20.223645.4622@Informatik.TU-Muenchen.DE>
- Lines: 32
-
- In article <TMH.92Aug20215543@doppel.first.gmd.de> tmh@doppel.first.gmd.de (Thomas Hoberg) writes:
- >used for QIC 120 on such a drive. Tapes can be pretty expensive and
- >more difficult to get for the higher capacities (QIC 525 or better).
- >Throughput is around 90KB/sec for QIC <320 and around 200KB/sec for
- >QIC <1350. QIC 1350 is supposed to be around 500KB/sec. 10GB capacity
- >is promised by the end of the decade (so far the QIC companies have
-
- The QIC-1000 (1GB) drives (such as Tandberg 4120) do 200k/sec as well
- as 300k/sec (switchable). Tandberg has recently announced a 2GB device,
- the 4200, which will also do 300k/sec.
-
- >4) Unix doesn't deliver a lot more than 200KB/sec off it's file system
- >when doing backups, so higher tape drive speeds have no practical
- >value, indeed might be slower because the drive might stop streaming.
-
- Perhaps the BSD FFS delivers more? I did not yet get around installing
- 386BSD (I have it laying around here) and it does not yet work with my
- tape drive (Tandberg 4120) properly (it can access it but delivers lots
- of error messages). However, under OS/2 2.0 with HPFS I get a througput
- of 16.5MB/min (~280k/sec) and the tape keeps usually streaming.
-
- This seems faster than affordable DAT's (which are still more expensive
- than the 4120) for which I could get specs (SONY) when I went shopping
- for the new tape drive recently.
-
- Kai Uwe Rommel
-
- /* Kai Uwe Rommel --- rommel@informatik.tu-muenchen.de */
-
- DOS ... is still a real mode only non-reentrant interrupt
- handler, and always will be. -Russell Williams
-
-