After successfully mounting the sdb13 partition from a contemporary i386 bookworm/sid installation ( that I rarely boot these days ) , and running another xfs_metadump from that i386 partition, I'm beginning to believe that the corruption message I'm getting while attempting to mount partition sdb13 from an up to date trixie/sid installation is due to several custom and possibly unsupported configuration and sub sequential behavioral quirks of this machine. Since both disk drives of this machine ( sda, sdb ) are currently near full I believe tt is going to take me a week or two at most to make enough available space, upgrades and backups ( over a slow USB connection ) so that I can verify my current beliefs of the severity of my initial concerns of the mounting error message. Please, let me know if my second xfs meta dump file will be useful and if so I'll attach it per request. I'm also OK with this bug being closed, as I'm more than confident now that I can work around and possibly update enough of this machines and64 and i386 installations, so grub no longer switches ( sda and sdb ) for one another during boot,. which along with my impatience and htting CTRL ALT DEL in the middle of boot as soon as I notice grub has switched disk drives is the main cause of the corruption as seen by all this machines bare metal amd64 installations and none of this machines bare metal i386 (not fully updated ) installations. Billy