Unable to mount hammer file system Undo failed

[Siju George]

Hi,

Is this a hardware trouble?

dfly-bkpsrv1# mount /dev/serno/Z2AD9WLW.s1d /mnt
hammer: mount  on /mnt: Input/output error

in dmesg

HAMMER(ROOT) recovery check seqno=8ca97e62
HAMMER(ROOT) recovery range 3000000006877528-3000000006892fa0
HAMMER(ROOT) recovery nexto 3000000006892fa0 endseqno=8ca98015
HAMMER(ROOT) recovery undo  3000000006877528-3000000006892fa0 (113272 bytes)(RW)
ad4: FAILURE - READ_DMA48 status=51<READY,DSC,ERROR>
error=40<UNCORRECTABLE> LBA=483752928
HAMMER: UNDO record, cannot access buffer 2000003436e35ca8
HAMMER(ROOT) UNDO record at 3000000006891a30 failed
HAMMER(ROOT) recovery complete
Failed to recover HAMMER filesystem on mount

Thanks

--Siju