1833867 Members
2092 Online
110063 Solutions
New Discussion

frecover checksum errors

 
Tom Poczman
New Member

frecover checksum errors

GDay All,

Has anyone come across the following errors. These errors have occured while doing an frecover verification after a nightly backup

Error is .....

frecover(1020): block checksum mismatch
frecover(1003): backup id does not match expected value
frecover(1061): attempt to continue recovery with new backup id? (^[yY]/^[nN]) frecover(5427): unable to open controlling terminal

have done a "cstm" on the tape device and the info is ....

Hardware path: 8/8.6.0


Device Qualifier: QUANTUMDLT8000
Product ID: DLT8000 Hardware Path: 8/8.6.0
Device Type: SCSI Tape Logical Unit Number: 0
Vendor: QUANTUM Product Rev Level: 010F
Firmware Major Version: 15 Firmware Minor Version: 0
Read Errors Corrected: 0 Read Errors Uncorrected: 0
Write Errors Corrected: 0 Write Errors Uncorrected: 0
Tape Motion Hours: 1099 Power On Hours: 19060
Read Compression Ratio: 1.0 : 1 Write Compression Ratio: 1.0 : 1
Compression Status: Enabled
Serial Number: CXA11P1343
Drive Status: Good
-- Information Tool Log for SCSI Tape on path 8/8.6.0 --

The initial fbackup string is ....

/etc/fbackup -v -c $BACKUP/config -f $TAPEDRIVE -g $GRAPH >> $TAPELIST 2>&1

Then the frecover string is ...

/etc/frecover -r -N -v -f $TAPEDRIVE >> $TAPEVERIFY 2>&1

The tape device used is ....

TAPEDRIVE=/dev/rmt/0m

The contents of the config file used in the fbackup command is ....

# cat config
blocksperrecord 128
records 64
checkpointfreq 256
readerprocesses 3
maxretries 2
retrylimit 5000000
maxvoluses 5000
chgvol /var/adm/fbackupfiles/chgvol
error /var/adm/fbackupfiles/error
filesperfsm 200

All DLT tapes have been replaced with new ones

Appreciate any input.

cheers
Tom
1 REPLY 1
Steve Steel
Honored Contributor

Re: frecover checksum errors

Hi

frecover is experiencing intermittant I/O problems while running.

Percentage wise it will be hardware.

Check the syslog.log for errors


Check also
1)Latest scsi/tap epatches
2)Can you read any other backups .
3)Is there a heavy process on the same bus at the time of the frecover which could be a problem.


Steve Steel
If you want truly to understand something, try to change it. (Kurt Lewin)