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I have a cron job that syncs an entire volume onto a backup volume nightly. The command is simple: # rsync -av --delete /export /mnt/backup where /export is /dev/md0 (a pair of mirrored drives) and /mnt/backup is /dev/hdb1, on a spare controller by itself, mounted just in time for this operation and then umounted. Both are ext3 volumes, and are 45G and 40G respectively. According to the logs, the first sync after my recent deletion/reorganization of tens of gigabytes on the source volume produced a lot of these errors, which have been present in every sync since then: building file list ... done home/dtalk/.links/socket home/dtalk/.mozilla/default/a4iaqe5z.slt/Cache/_CACHE_001_ Warning: unexpected read size of 0 in map_ptr Warning: unexpected read size of 0 in map_ptr home/dtalk/.mozilla/default/a4iaqe5z.slt/Cache/_CACHE_MAP_ Warning: unexpected read size of 0 in map_ptr Warning: unexpected read size of 0 in map_ptr home/dtalk/.mozilla/default/a4iaqe5z.slt/XUL.mfasl Warning: unexpected read size of 0 in map_ptr Warning: unexpected read size of 0 in map_ptr home/dtalk/Mailbox Warning: unexpected read size of 0 in map_ptr Warning: unexpected read size of 0 in map_ptr home/systems/raymond/lib/RQ.pm Warning: unexpected read size of 0 in map_ptr Warning: unexpected read size of 0 in map_ptr home/www/ home/www/.bash_history home/www/cgi-bin/systems/raymond.cgi Warning: unexpected read size of 0 in map_ptr Warning: unexpected read size of 0 in map_ptr ad nauseum. Perhaps this suggests a write at the time of the read, but some of these occur on files which were not open (mozilla wasn't running, for instance). Weirder is this ... RQ.pm is a Perl module, nothing but text, but look at the outputs of 'ls -al' and 'file' for the two versions: atlantis:root 506 # ls -al /mnt/backup/home/systems/raymond/lib/RQ.pm - -rwxr-xr-x 1 systems systems 75941 Feb 6 16:54 /mnt/backup/home/systems/raymond/lib/RQ.pm atlantis:root 507 # file !$ file /mnt/backup/home/systems/raymond/lib/RQ.pm /mnt/backup/home/systems/raymond/lib/RQ.pm: data atlantis:root 508 # ls -al /export/home/systems/raymond/lib/RQ.pm - -rwxr-xr-x 1 systems systems 61220 Feb 6 16:54 /export/home/systems/raymond/lib/RQ.pm atlantis:root 509 # file !$ file /export/home/systems/raymond/lib/RQ.pm /export/home/systems/raymond/lib/RQ.pm: ASCII English text Visually, the backed up version appears ok, and 'cat -v RQ.pm' doesn't show me any garbage characters. Yet it's being reported as a binary file, and clearly the size differs. I have umounted and fsck'd both the source and backup volumes, and both came up clean. Oddly, though, the fsck of /dev/md0 told me that the filesystem had been modified, but didn't appear to have found any errors or made any changes. What might be causing this apparent corruption? - -d -----BEGIN PGP SIGNATURE----- Version: PGP 6.5.8 Comment: Made with pgp4pine 1.75-6 iQA/AwUBPGWydr9BpdPKTBGtEQL2WQCfVFe3gii1qvRb4EjSI7UXFt8RsbkAnR6u /sclRPjLRRviOIv67Nt9+gsd =XpgF -----END PGP SIGNATURE----- _______________________________________________ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
