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Re: [Linux-cluster] gfs 6.1 superblock backups



Chris Adams wrote:
On Tue, 2008-06-03 at 11:03 -0400, Wendy Cheng wrote:
Chris Adams wrote:
Does GFS 6.1 have any superblock backups a la ext2/3?  If so, how
can I find them?
Unfortunately, no.


If that is the case, then is it safe to assume that fs_sb_format will
always be bytes 0x1001a and 0x100b on a gfs logical volume, and that that is the only location on the lv that it is stored? I see #define GFS_FORMAT_FS (1309) /* Filesystem (all-encompassing) */
and that is the location that where I see 0x051d (1309) stored.

Yes .. in theory (since I don't have the source code in front of me at this moment).

Thinking to hand patch it, don't you ? ... There is a header file (I think it is gfs_ondisk.h) that describes the super block layout.

-- Wendy



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