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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LEARN ABOUT DEBIAN

zstreamdump

zstreamdump(8)						  System Administration Commands					    zstreamdump(8)

NAME

       zstreamdump - filter data in zfs send stream

SYNOPSIS

       zstreamdump [-C] [-v]

DESCRIPTION

       The  zstreamdump  utility  reads  from the output of the zfs send command, then displays headers and some statistics from that output.  See
       zfs(1M).

OPTIONS

       The following options are supported:

       -C

	   Suppress the validation of checksums.

       -v

	   Verbose. Dump all headers, not only begin and end headers.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWzfsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Uncommitted		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       zfs(1M), attributes(5)

SunOS 5.11							    21 Sep 2009 						    zstreamdump(8)