[SunHELP] query on "tape" operation

[Henderson, David]

Could be.

One reason for this is you are sending it to 0cn which will try and compress your data which is already compressed so will increase the time taken to do the archive and could increase the tape usage although I am no expert on this so don't quote me on it.

If you are using an E450 what kind of DDS tape are you using.  I would imagine the drive would be at least a DDS3 and possibly a DDS4 is purchased recently.  In this case you could use higher capactity tapes IIRC 4 GB is DDS2????

I'm sure someone will correct me.

David Henderson

-----Original Message-----
From: TAG DBA [mailto:dbatag at tatainfotech.com]
Sent: 14 December 2001 11:17
To: 'sunhelp at sunhelp.org'
Subject: [SunHELP] query on "tape" operation


Solaris 8 on Sun E450
----------------------------------
I was trying to estimate how many sets of database backups can fit onto one 4 GB DAT tape.
One set approx is of size 1 GB. So atleast 3 sets should get copied to tape.
The command I type is :
$ tar cvf /dev/rmt/0cn $DUMPS

However during the third copy operation I got this error:

a ./archlogs_14_dec_01.Z 696322 tape blocks
tar: write error: unexpected EOF
Backing up export dump expTAG1SPZ_Fri_full.dmp.Z and log file /s0003/TAG1SPZ/expdumps/expbu_TAG1SPZ_14_dec_01.log ....
a expTAG1SPZ_Fri_full.dmp.Z 563396 tape blocks
tar: write error: unexpected EOF
Ending Backup Fri Dec 14 16:54:19 GMT 2001

Does it mean that the tape is full ???
Regards,
~aslam
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