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Server - 2 disks - How to mirror

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Operating Systems Solaris Server - 2 disks - How to mirror
# 15  
Old 05-28-2005
one thing you need to remember though is that ...

disk mirroring will not protect you from software errors

... you do "rm -rf" from "/" by mistake or have software corruption that affects the box and your box is toast because that error is also propagated to the mirror disk ...

you might want to do snaphot copies of your mirrors to a non-mirrored disk through a nightly cron job using unix backup utilities (i.e., dd, ufsdump, tar, cpio, etc.) just so you can at least recover quickly to a known clean point without resorting to fresh rebuilds and restores from backup tapes ...
# 16  
Old 06-02-2005
Quote:
Originally Posted by frustrated1
no problem..

I could accept 20 mins downtime per day.
H/W not great - no raid controller that I know of..
Compaq Proliant DL380 P6 1390 MHz

I would like for the following:
2 disks.
1 is main disk (root disk)
1 is mirror of the root disk. This should be mirror all of the time.
ie. if root disk fails then mirror will be in sync up until time of failure.
I can then replace failed disk and new disk will re-sync with mirror.

Is this possible? do i need some software constantly updating the mirror with any changes on the root disk?
Would I be better just syncing once a day?
Its a server that will mainly have scripts on it - I could live with the data being 24 hours old if I have to.
Hold on guys, DL380 comes with hardware mirroring and hot-plug. Better go with it.


Tom
# 17  
Old 06-23-2005
looks like I will go with following:

ok setenv boot-device disk disk1
ok setenv diag-device disk disk1

And do some sort of nightly snapshot -as the data on disk will not change regularly - I just want to have a copy of the disk incase of disk failure - so that system can boot to the other disk - with fairly up to date data.

Any one know the commands I can use for the snapshot?
By the way - how do I get the full disk name for the prom settings?
# 18  
Old 06-23-2005
Quote:
Any one know the commands I can use for the snapshot?
fssnap - create temporary snapshots of a ufs file system

Quote:
By the way - how do I get the full disk name for the prom settings?
? don't know what you mean, if you search for the "solaris"name like cxt0xd0x0, there is no way to get this, if you just look for the hardware names you could try:
probe-scsi-all (on ide: probe-ide)
show-disks
or you look to resolv your aliases then:
devalias

greetings PRESSY
# 19  
Old 06-23-2005
look here for a dump script ... run the script daily from cron at a time when the box is most quiet ...

the prom only requires disk, disk1, disk2, etc. for what you need to set --- you don't need the complete cxtxdx device names ... if you're curious about those --- try
Code:
format < /dev/null
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