Steps to check and fix bad blocks on disk: ========================================== => example of bad disk7 on chippewa after swap with cherokee - switch to root: su - - to get disk infos use 'prtvtoc' prtvtoc /dev/rdsk/dks1d7vh * /dev/rdsk/dks1d7vh (bootfile "/unix") * 512 bytes/sector * 214 sectors/track * 21 tracks/cylinder * 3956 cylinders * 2 cylinders occupied by header * 3954 accessible cylinders * * No space unallocated to partitions Partition Type Fs Start: sec (cyl) Size: sec (cyl) Mount Directory 1 raw 8988 ( 2) 314580 ( 70) swap 7 xfs yes 323568 ( 72) 17454696 (3884) /disk7 8 volhdr 0 ( 0) 8988 ( 2) 10 volume 0 ( 0) 17778264 (3956) - to mark bad blocks and reformat use 'fx -x' => WARNING: make sure that all IDs are correct. typing the wrong ID will wipe out all data on the corresponding disk during formatting process with auto-option ('a') => see man pages for 'dks' (or 'jag', 'rad') about disk nomenclature fx version 6.3, Nov 26, 1996 fx: "device-name" = (dksc) #device name fx: ctlr# = (0) 1 #controler number fx: drive# = (1) 7 #drive number fx: lun# = (0) #logical unit ...opening dksc(1,1,0) fx: partitions in use detected on device fx: devname seq start end owner cause fx: /dev/rdsk/dks1d1s7 2 1260688 17780047 xfs/efs already in use fx: /dev/rdsk/dks1d1s1 1 6688 1260687 swap already in use fx: Warning: this disk appears to have mounted filesystems. Don't do anything destructive, unless you are sure nothing is really mounted on this disk. ...controller test...OK Scsi drive type == MICROP 3391SS ----- please choose one (? for help, .. to quit this menu)----- [exi]t [d]ebug/ [l]abel/ [a]uto [b]adblock/ [exe]rcise/ [r]epartition/ [f]ormat fx> a ----- create sgiinfo----- ...creating default sgiinfo * * * * * W A R N I N G * * * * * about to destroy data on disk dksc(1,1,0)! ok? yes writing label info to dksc(1,7,0) ----- exercise----- sequential pass 1: scanning [(0), (17778264)] (3956 cyls) here are parts of the messages during this procedure: > ........... 10.......... 20.......... 30.......... 40.......... ... > 3100.......Tried to read 4494 blocks, only read 0 at (13962858) retry > #2 Tried to read 4494 blocks, only read 0 at (13962858) retry #3 ... > 3110....... Tried to read 4494 blocks, only read 0 at (14007798) > retry #2 ... 3120....... 3130.......... 3140.......... > 3150.....Tried to read 4494 blocks, only read 0 at (14178570) retry #2 > Tried to read 4494 blocks, only read 0 at (14178570) retry #3 ..... > 3160.......... 3170.......... 3180.......... 3190.......... > 3200.......... 3210.......... 3220 .......... 3230.......... > 3240.......... 3250.......... 3260.......... 3270.......... > 3280.......... 3290..... ..... 3300..Tried to read 4494 blocks, only > read 0 at (14839188) retry #2 Tried to read 4494 blocks, only read 0 > at (14839188) retry #3 Tried to read 4494 blocks, only read 0 at > (14839188) retry #4 Tried to read 4494 blocks, only read 0 at > (14839188) fx/auto/complete: Error: read error in chunk starting at > block 14839188, looking for failing block(s) sector by sector > fx/auto/complete: Error: Couldn't find bad block after 3 tries, > probable soft error ........ 3310.......... 3320.......... > 3330.......... 3340.......... 3350.......... 3360.....Tried to read > 4494 blocks, only read 0 at (15122310) retry #2 ..... 3370.......... > 3380.......... 3390.......... 3400.......... 3410.......... > 3420.......... 3430.......... 3440Tried to read 4494 blocks, only read > 0 at (15459360) retry #2 *************** This will test and mark bad blocks and reformat. Worth a try though it might prove the disk is in too bad shape to use. - check file system with: xfs_check xfs_repair (danger of destruction!)