Linux Storage system: looking for advices Post: 302385283

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Special Forums Hardware Filesystems, Disks and Memory Linux Storage system: looking for advices Post 302385283 by pludi on Thursday 7th of January 2010 04:56:45 PM

01-07-2010

Registered User

Quote:

Originally Posted by Loic Domaigne

[...]
As expected, only the files from the failed partition were missing after the restore operation.[...]

Which is, usually, something you do not want to happen. Personally, I'd rather have a system that's a bit slower if a disk goes bad, but keeps on working, than losing files and not being able to use the system until I've got a replacement disk. But that might just be me.

Quote:

Originally Posted by Loic Domaigne

[...]
However, I failed to restore the file system if /dev/vda6 gets damaged. I used an alternate superblock for fsck (one located on vdb2 or vdb3), but no avail.[...]

That might be because of the striping done by LVM. The volume manager doesn't fill up the first disk, then the second, and so on, but first fills the first stripe (by default 4 MB) on the first disk, the first stripe on the second disk, and so on. With that scheme it might very well be that all superblocks end up on the same disk.

pludi

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sharefs

sharefs(7FS)							   File Systems 						      sharefs(7FS)

NAME

       sharefs - Kernel sharetab filesystem

DESCRIPTION

       The sharefs filesystem describes the state of all shares currently loaded by the kernel. It is mounted during boot time as a read-only file
       at /etc/dfs/sharetab.

       Filesystem contents are dynamic and  reflect  the current set of shares in the system. File contents are described in sharetab(4).

       File contents can be modified as a result of share(1M), sharectl(1M), sharemgr(1M) and changing properties of a zfs(1M) data set.

       The module may not be unloaded dynamically by the kernel.

FILES

       /etc/dfs/sharetab    System record of shared file systems.

SEE ALSO

       share(1M), sharectl(1M), sharemgr(1M), zfs(1M), sharetab(4)

SunOS 5.11							    31 Oct 2007 						      sharefs(7FS)