Mailinglist Archive: opensuse (1213 mails)

[Dirk Gently <dirk.gently00@xxxxxxxxx>]

IDS000 wrote:
> Like many, I too have had my share of RAID volumes being created and mounting 
> perfectly
> after creation only to findthat the Volume will not mount at boot and failing 
> to any number of error levels.
>
> Often the user is presented with a shell repair mode and running repairs like 
> fsck could be the
> worst thing you can do. Often the problem is the superblock creation 
> time...here's the kicker...
>
> If the RAID was created whilst a system is up and running, that system 
> date/time is taken
> from your prevailing clock. Most of us set up a NTP Network Service to auto 
> sync with time
> servers all over the world.
>
> IF, at boot, your PC's CMOS date/time is behind the date/time of the PC's 
> session clock, you
> will be flooded with huge numbers of reasons why the volume wont mount...
>
> The real reason is that the Superblock will be written to the date/time of 
> your PC session clock and now at boot, with your CMOS clock retarded!
> You will be flooded with various error levels as to why the volume wont mount 
> and some reasons are really fancifully and as a consequence to an Invalid 
> Superblock
>
> The number of error levels that could possibly appear at boot as to why the 
> volume wont mount could be just about any reason. Before you start 
> entertaining using any repair mode, or any maintenance mode where / is 
> mounted rw, just make sure your CMOS
> clock is accurate.
>
> This might just fix your never ending issues with creating ANY RAID Volume 
> that wont mount at boot
>
> Hope this helps a few guys/girls -Scott - .AU


Why would this have an effect on RAID-ed filesystems but not
on non-RAID filesystems?  They both have superblocks, and as
far as I know, there is no additional "RAID superblock", just
the same old superblock in the filesystem which we have been
living with since 1970's versions of Unix.

-- 
To unsubscribe, e-mail: opensuse+unsubscribe@xxxxxxxxxxxx
To contact the owner, e-mail: opensuse+owner@xxxxxxxxxxxx