Messages in this thread | | | From | "William M. Perkins" <> | Subject | Re: Bugs in 1.3.8[8,9] and 1.3.90 | Date | Fri, 19 Apr 1996 21:49:30 -0400 (EDT) |
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> Hiho > > Could people with scsi tapes please try the following: > < Text deleted....... > > > I always get different files and I want to know if its somewhere in my > hardware or in the scsi-tape support. > My setup is: > - asus PCI/I-486SP3 motherboard with ncr53c810 on board > - hp C1553A DAT tape (Rev: 9503) > - conner cfp 1060s (with patched firmware) > - both, the original linux driver and the bsd-driver port show this error > - scsi tape as module > > I doubt that the tape is defect, because (as far as I know) DATs always check > the data after it is written, so I assume that the data is already wrong > when it reaches the tape. The scsi bus seems reliable to me because the > harddisc works fine and the bsd ncrdriver uses parity (and I got no parity > errors so far). The conclusion is that there is a bug somewhere in the > linux scsi-tape code, but I'm not sure. > > Matthias
Mathias,
I have the following configuration: - 486-PSD-IO motherboard with builtin NCR 53c810 and IDE controller - 486/DX2 66 MHz CPU - 32 MB of memory (4 - 4x36-60ns) - SoundBlaster 16 sound card - 3c503 Ethernet card (thinnet) - Paradise S3 864 PCI graphic card (2 MB) - I/O card with 2 - 16550A serial ports - Acer 56L 15" monitor - Cardinal 28.8Kb modem SCSI devices (IDE is disabled) - CONNER Model: CFP1060S 1.05GB Rev: 213C (patched up, of course) - FUJITSU Model: M2684S-512 Rev: 2026 - QUANTUM Model: PD210S Rev: 527 - TOSHIBA Model: CD-ROM XM-3401TA Rev: 2873 - CIPHER Model: ST150S2 (QIC150) Rev: G76M Short list of software used: - RedHat 2.1 Linux Nov 1995 distribution (ELF with some a.out) - kernel 1.3.91
I backup three disk partitions about once a week to three QIC-250 cartridge tapes on the Cipher drive using the tar utility. Each of these tapes is than compared against its original disk partition. Total amount of data backed up: ~ 700 MBytes.
When I configured the NCR 53c810 driver in the kernel to 10 MHz Fast-SCSI and to always negotiate synchronous transfers, I get some tape compare errors: about one error every ~ 50 MBytes. If I change only the speed to 5 MHz with disconnect support, No errors occurred in the data comparisons with good tapes.
The Cipher tape drive is fairly old, but still works very well.
Cheers!
Bill
-- William M. Perkins Internet - wperkins@us.net The Greenwood or - bill@cais.com Commodore is dead. Long lives the Amiga! (AmigaOS/Linux/NetBSD)
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