https://community.hpe.com/t5/operating-system-hp-ux/file-system-recovery/m-p/2426366#M1431 After a system (9000/HPUX10.20) crash, in single user mode fsck returns "CAN'T READ BLOCK ...." and terminates without repairing the file system. <BR />I tried to use alternate superblock from file /var/adm/sbtab:<BR /># fsck -b block_num /dev/vgxx/rlvolx<BR />The result was the same.<BR />Is there a way to recover the file system. Thu, 15 Jun 2000 09:18:06 GMT Rumen Ginev 2000-06-15T09:18:06Z https://community.hpe.com/t5/operating-system-hp-ux/file-system-recovery/m-p/2426366#M1431 After a system (9000/HPUX10.20) crash, in single user mode fsck returns "CAN'T READ BLOCK ...." and terminates without repairing the file system. <BR />I tried to use alternate superblock from file /var/adm/sbtab:<BR /># fsck -b block_num /dev/vgxx/rlvolx<BR />The result was the same.<BR />Is there a way to recover the file system. Thu, 15 Jun 2000 09:18:06 GMT https://community.hpe.com/t5/operating-system-hp-ux/file-system-recovery/m-p/2426366#M1431 Rumen Ginev 2000-06-15T09:18:06Z https://community.hpe.com/t5/operating-system-hp-ux/file-system-recovery/m-p/2426367#M1432 Reboot the system and interupt the boot process.<BR />Through ISL prompt use the command "hpux -lm" (ie maintenance mode)<BR />run fsck manually.<BR /> Thu, 15 Jun 2000 09:31:20 GMT https://community.hpe.com/t5/operating-system-hp-ux/file-system-recovery/m-p/2426367#M1432 CHRIS_ANORUO 2000-06-15T09:31:20Z https://community.hpe.com/t5/operating-system-hp-ux/file-system-recovery/m-p/2426368#M1433 can't read block messages are usual defective media.<BR /><BR />depending on whether it's hfs or jfs, hfs supports the '-f' option. You could mount it with that and then attempt to backup your data (don't run live with it). Then once backed up, replace the disk Thu, 15 Jun 2000 12:26:24 GMT https://community.hpe.com/t5/operating-system-hp-ux/file-system-recovery/m-p/2426368#M1433 Andy Monks 2000-06-15T12:26:24Z