Hello,
I am having some problems with my HP Colorado 8GB. It is an external
drive, connected to the parallel port (that's why I chose this ML :)
The main problem is, that the backup seems to be too slow. I got less
than 10 MB/min. I wouldn't complain on that but as a matter of fact my
brother can backup with about 15 MB/min with the same tape drive but
with a much slower computer. Of course I stopped all heavy processes.
Also I got this error sometimes:
kernel: pt0: write DSC timeout
kernel: pt0: Sense key: 0, ASC: 0, ASQ: 0
What I tried to solve the problems:
- changed the IRQ and the port of the parport in BIOS
(currently it is IRQ 5 and port 3BC)
- changed EPP-Mode from 1.7 to 1.9
- changed the mode and the delay as described in pt.c
- changes the blocksize with the "-b" option in tar to 32kb
The last two methods caused some improvement. First I got a timeout
after about 20 min. I put the system in Single user mode and started
again with this command:
time tar -cv -b 64 -T backup.txt -f /dev/pt0
I wrote more than 3GB to the tape with an average speed of about 13
MB/min. This is not too bad but it is still strange that my brother
gets 15 MB/min out of the box with a slower machine.
My configuration:
Athlon 550
256MB RAM
20GB IBM-HD (UDMA 33)
Kernel 2.2.16
My brother's configuration:
AMD-K6-2 500
128MB RAM
Kernel: probably 2.4.0-test1-ac25-very-new-just-released-2 ;)
Any ideas?
Phil
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This archive was generated by hypermail 2b29 : Sat Jun 17 2000 - 03:18:19 EDT