[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: Install and RAID

On Tue, Jan 23, 2001 at 10:53:50AM -0600, Steve Langasek wrote:
> But if all you're worried about is having a backup of your data, then you
> could use any number of other methods to mirror data from one drive to the
> other and use that as a backup solution; 

Such methods will always have a window between the time the backup is
run and the time the disk crashes. Soft raid eliminates that.

> And you're right that a jfs doesn't completely prevent data loss from power
> failures. It does, however, prevent precisely the sort of data loss that fsck
> looks for.

No, it doesn't. What fsck is looking for is stuff that's in the process
of being written. A jfs doesn't have to look for that stuff, because it
has a last known good state--but data in the process of being written is
gone. The advantage of the jfs is that it's much quicker at boot time,
because it doesn't have to scan the whole disk looking for inconsistent

Mike Stone

Reply to: