* Matt Hoppes ([EMAIL PROTECTED]) [991015 17:20]:
> Anyway, this paragraph:
> "Linux lacks a commercial quality Journaling File System. This means
> that in the event of a system failure (such as a power outage) data
> loss or corruption is possible. In any event, the system must check
> the integrity of the file system during system restart, a process that
> will likely consume an extended amount of time, especially on large
> volumes and may require manual intervention to reconstruct the file
> system."
This is true. Linux doesn't have a real journaled filesystem, it is a
drawback (Although, I'm not sure that NT has one that isn't
VaporWare(tm)..), all other major Unices have them. SGI has
Open-sourced their XFS, so assumedly it will be ported to Linux soon.
> #1 If you are running a server you should have SOME sort of power backup
But that isn't the point. power backup will not help you in all
situations. if the cable to the hard drive falls in to the fan and is
cut in two, etc (Don't laugh -- if it's the SCSI ID swithch cable, it's
a real bitch to figure out..).
> #2 Personally, and this is just me, if my system dies because of a power
> failure, I would want the drive checked for errors before anything is
> writen to or read from it.
Correct. But, that's because you do not have a real journaled
filesystem (Novell's NSS, for example.) You do not need to do a
filesystem integrity check in the manner you are thinking. You may need
to run a physical check of the media, but the filesystem logs all
activity, and can reconstruct any writes that were happening when it
crashed.
--
Jonathan J. Miner-------------------Division of Information Technology|
[EMAIL PROTECTED] University Of Wisconsin - Madison|
608/262.9655 Room 3149 Computer Science|
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