10 Feb
2008
10 Feb
'08
2:16 a.m.
I have been playing with Eric Smith "TapeCopy" and some cartridge tapes.After
reading them, when I try to write them, I get an error message that the tape image
is too long for the for the 32768 byte buffer . I'm running it on a linux machine
ver is RedHat 7.2. Not to sure why ??? tapes where DC600 (60 Meg).
- jerry
Jerry Wright
JLC inc
g-wright at att.net
10 Feb
10 Feb
5:51 a.m.
g-wright at att.net wrote:
I have been playing with Eric Smith
"TapeCopy" and some cartridge tapes.After
reading them, when I try to write them, I get an error message that the tape image
is too long for the for the 32768 byte buffer . I'm running it on a linux machine
ver is RedHat 7.2. Not to sure why ??? tapes where DC600 (60 Meg).
Check the drive's block size ("mt" command in RH7.2), on reads as
well as writes. Every time I've had trouble with TapeCopy, that was the
problem.
Doc
12:07 p.m.
On Sunday 10 February 2008 05:51, Doc Shipley wrote:
g-wright at att.net wrote:
I might add that some (all?) QIC cartridge tapes (DC600 I know is in
this group) use fixed block sizes, so tape copy doesn't really get you
anything over using dd to copy the tape into a (bunch of) file(s) and
back, or straight tape-to-tape. From what I remember, those drives
seemed to like a 32k block size too.
Pat
--
Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
I have been playing with Eric Smith
"TapeCopy" and some cartridge
tapes.After reading them, when I try to write them, I get an error
message that the tape image is too long for the for the 32768 byte
buffer . I'm running it on a linux machine ver is RedHat 7.2. Not
to sure why ??? tapes where DC600 (60 Meg).
Check the drive's block size ("mt" command in RH7.2), on reads as
well as writes. Every time I've had trouble with TapeCopy, that was
the problem. 
12 Feb
12 Feb
1:26 p.m.
New subject: error with tapecopy writing, buffer to small ???
I've similar problems on Linux 2.4 kernels when writing to tape
devices via DMA with a block size > 32k. It can be solved if you are
willing to move to a 2.6 kernel (and your hardware supports large DMA
transfers). Exactly 32kB blocks usually work.
I'd be surprised if your tape images actually have blocks bigger than
32k, but I suppose it is possible.
On Feb 9, 2008 11:16 PM, <g-wright at att.net> wrote:
I have been playing with Eric Smith
"TapeCopy" and some cartridge tapes.After
reading them, when I try to write them, I get an error message that the tape image
is too long for the for the 32768 byte buffer . I'm running it on a linux machine
ver is RedHat 7.2. Not to sure why ??? tapes where DC600 (60 Meg).
- jerry
Jerry Wright
JLC inc
g-wright at att.net
5985
days inactive
5987
days old
3 comments
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participants (4)
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doc＠mdrconsult.com -
g-wright＠att.net -
korpela＠ssl.berkeley.edu -
pat＠computer-refuge.org