Re: hardware raid1 onboard

From: Barbie LeVile (barbie_at_gods-inc.de)
Date: 12/24/03 

Date: Wed, 24 Dec 2003 06:31:35 +0100

On Wed, 24 Dec 2003 01:19:27 +0100
Bastiaan Spandaw <newsgroupaddy15@becobaf.com> wrote:

> On Wed, 24 Dec 2003 00:10:26 +0000, Paul S. Brown wrote:
>
> >
> > It can't. What's your problem with SW RAID?
> >
>
> Well .. I dont have any experience with solaris way of doing software
> raid, but.
>
> - is it possible to have SW root RAID?

Yes, easily

>
> These points I have form experience with linux SW RAID
>
> - what if the bootsector gets corrupted on the primary disk?

you have another on the second or third drive.
setup correctly the system will failover the booting to the remaining
drives.

>
> - Once a member of a SW RAID-1 mirror had errors on partition 4, but
> because the server crashed multiple times partitions 1 and 2 got corrupted
> on the other disk.. if wasnt able to swap disk 1 or two..

well, that depens on how the filesystem are setup, but in solaris 9 and up
the raid software sets the whole drive to error and disables it if its a
physical error of the drive.
If its just a soft error only the filesystem gets errored.
in either case, the system should not crash, unless you are VERY unlucky.

>
> HW RAID is just easier to use..
> I can call unskilled "remote-hands" in
> the datacenter to swap a HW RAID setup, but not allways when its a SW RAID
> server..

yes, once its setup, all the on site person needs to do is swap the new
drive in, with the right system its hotswap and no need to shutdown the
system. you can then go in remotely to sync the drives.
matter of 5 mins

>
> Is solaris way of doing SW RAID easier/more reliable?
> More redundant? (bootsector thing)

yes, svm is supperior to lvm 

-- 
Barbie - Prayers are like junkmail for Jesus
I have seen things you lusers would not believe.
I've seen Sun monitors on fire off the side of the multimedia lab.
I've seen NTU lights glitter in the dark near the Mail Gate.
All these things will be lost in time, like the root partition last week.
Time to die.

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