cpio/tar large file to DDS as /dev/rmt/0

[Malcolm]

Hello,

I'm trying to copy about 14Gb of files (compressed tar archives) to a DDS4
drive via cpio and tar and am having problems. I get various messages about
file sizes (each file is less than 512Mb) and EOF etc. when trying this and
have tried writing a 20GB file which also fails. This is under Solaris 8.
Also, when trying to use the same syntax but writing to disk, there's no
problem, e.g. this fails

find . -name mydirectorytobackup -print | cpio -vocB > /dev/rmt/0

but this would be ok writing to disk.

find . -name mydirectorytobackup -print | cpio -vocB >
/myothertempfilesys/backup.cpio

I've double checked the maths on the directory I'm trying to back up and
it's well under the 20Gb capacity of the drive (and tape in there). Any
suggestions would be welcome.

Thanks,

Malc

[Anthony Mandic]

Lars Tunkrans wrote:

> I assume you are using DDS3 or DDS4 tape media ?
> I have been unable to use DDS or DDS2 media on my DDS4 tape drive,
> But a DDS3 drive does write to DDS and DDS2 media.

That's funny, I was able to write to a DDS4 tape in a DDS2
tape drive. But, yes, a DDS4 drive is a bit flaky in reading
DDS2 tapes (this might have just been an alignment issue
though).

-am © 2003

[Lars Tunkrans]

Anthony Mandic wrote:

> Lars Tunkrans wrote:
>
>

>>I assume you are using DDS3 or DDS4 tape media ?
>>I have been unable to use DDS or DDS2 media on my DDS4 tape drive,
>>But a DDS3 drive does write to DDS and DDS2 media.

>
>
> That's funny, I was able to write to a DDS4 tape in a DDS2
> tape drive. But, yes, a DDS4 drive is a bit flaky in reading
> DDS2 tapes (this might have just been an alignment issue
> though).

I was talking about writing tapes . I think I have read a DDS2
tape in the SunBlade2000 / DDS4 at work, but am not certain.

--
================================================== ======
Lars Tunkrans
smtp: lars dot tunkrans at bredband dot net
--------------------------------------------------------

[Andrew Gabriel]

In article <3F139849.EA259AAC@hotmail.com>,
Anthony Mandic <kr@hotmail.com> writes:

> Lars Tunkrans wrote:
>

>> I assume you are using DDS3 or DDS4 tape media ?
>> I have been unable to use DDS or DDS2 media on my DDS4 tape drive,
>> But a DDS3 drive does write to DDS and DDS2 media.

>
> That's funny, I was able to write to a DDS4 tape in a DDS2
> tape drive. But, yes, a DDS4 drive is a bit flaky in reading
> DDS2 tapes (this might have just been an alignment issue
> though).

HP DDS4 drives should be able to read/write all older DDS tapes, except:
they can't read or write 60M tapes;
they can't write 90M tapes but can read them.
(60M and 90M tapes are both DDS[1].)
It should have no trouble with a DDS2 tape.

--
Andrew Gabriel