UFSDUMP / UFSRESTORE

[mgrun]

Hello

I have a DLT tape drive which I use to backup certain servers on my network using the the following command.
/usr/sbin/ufsdump 0dsbfu 85937 280000 126 lotus:/dev/nrst30 filesystem

When I tryed to restore it the other day using the following command:

ufsrestore -ivf /dev/nrst30 or
ufsrestore -xvf /dev/nrst30 specific_directory

it took a long time to restore it.
I restored the same directory using an LTO tape and it took 10 min.
Micha Grunberg
Unix Sys-Admin

 

[wtrepani]

When you say it took a long time, how long do you mean?

A DLT won't restore as fast as a LTO as the LTO drives are faster. Judging by the switches you are using on ufsdump, I would guess that you are using older tapes (lower capacity) and/or an older DLT drive also. This could affect the time it takes to restore because the system is trying to figure out all the switches you used to back it up. Have you tried backing it up without the size and blocking switches to see if the restore is faster?

Will

 

[wtrepani]

When you say it took a long time, how long do you mean?

A DLT won't restore as fast as a LTO as the LTO drives are faster. Judging by the switches you are using on ufsdump, I would guess that you are using older tapes (lower capacity) and/or an older DLT drive also. This could affect the time it takes to restore because the system is trying to figure out all the switches you used to back it up. Have you tried backing it up without the size and blocking switches to see if the restore is faster?

Will

 

[mgrun]

Thank you

No I havent tried doing ufsdump without any switches, but I will try.
A long time is probably about 45 min for abot 15MB Micha Grunberg
Unix Sys-Admin

 

[sadmin]

1: I want to ufsdump /etc and /usr ,on a dlt tape in compressed form, which are on different mount points. If i give the ufsdump command seperately for each ,it is not getting appended. How to do?

 

[jamisar]

use a NOT rewinding tape.
on solaris: /dev/rmt/<digit>n