From: HRISHIKESH KULKARNI (hrk007@yahoo.com)
Date: Wed Mar 16 2005 - 12:16:34 EST
Hi All,
I have a a basic question on backup and
restoration.So please excuse me if I sound like a
newcomer to this.
I have a E4500 server with 3 A5200 disk arrays. We
have configured RAID 1-0 logical volumes on the disk
arrays with Veritas Volume Manager which also has
encapsulated and mirrored the two internal hard disks
of the E4500 server. The internal disk has SOLARIS OS
and Veritas and other applciation software installed
installed. The disk arrays mostly have oracle data
files.
I want to backup entire system to LTO1 TAPES in SUN
L100 tape library and restore from the same. This has
to be demonstrated actually to someone.
Since file systems are all UFS ( have not used
Veritas File System Issues), I will be using ufsdump
and ufsrestore to backup and restore each of the
individual file systems listed in df -k output below.
My questions are :-
1.) Is this as straightforward as as level 0 dump of
each file system on tape with ufsdump and then
restoration of the same with ufsrestore
Will I have to do anything extra for recovering the
Veritas configured Volumes and will just simple
restoration by ufsrestore take care of all RAID1-0
configurations done before in Veritas Volume
manager(for all file systems), or is this a separate
recovery process after restoring the Solaris OS on the
internal disks
2.) Since LTO1 at the most are 200 GB , can one my
600 GB worth file system span 3 LTO 1 tapes?
Will restoration via ufsrestore of that file system
take care of this ( ask for next tape when first one
finishes). Same query while backing up a file system
, can ufsdump take care to see the file system spans 3
tapes and will request next tape when first one
finishes
3.) Is any external software like Veritas Netbackup
necessary for this full system back on ufsrestore and
ufsdump will work just fine, without having to go
through the expense
4.) Is there a significant speed reduction while
backing in compressed mode? Can ufsdump and ufsrestore
provide options for backing in compressed mode
df -k output:-
Filesystem kbytes used avail capacity
Mounted on
/dev/vx/dsk/rootvol 6050021 4006614 1982907 67%
/
/proc 0 0 0 0%
/proc
fd 0 0 0 0%
/dev/fd
mnttab 0 0 0 0%
/etc/mnttab
swap 9308848 16 9308832 1%
/var/run
swap 9308856 24 9308832 1%
/tmp
/dev/vx/dsk/DATA_INDEX/vol_index_01
134350285 118817071 2098186
99% /INDEX
/dev/vx/dsk/data2_dg/voldata2_1
537404773 459213457 24450839
95% /DATA2
/dev/vx/dsk/diskgroup1/voldg1_1
671756098 530616349 73964140
88% /DATA1
Yes , i know not advisable to have file ssyetms so
full, but no choice ;)
Thanking you all in advance for your answers and again
apologizing for asking very basic questions
Regards,
Hrishi
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