On 07/27/2014 06:50:49 PM, meino.cra...@gmx.de wrote:
Hi Mick,
thanks for your reply on the topic.
I executed the mkswap/dd combo a several times today. Since I have
no logs I repeated again. Here are the results:
solfire:/home/user>mkswap -L swap -f -c /dev/sda2
1 bad page
mkswap: /dev/sda2: warning: wiping old swap signature.
Setting up swapspace version 1, size = 6291448 KiB
LABEL=swap, UUID=e742c0a6-862c-41e9-be4b-698b33c5a236
solfire:/home/user>dd if=/dev/zero of=/dev/sda2 bs=512 conv=notrunc
dd: error writing ‘/dev/sda2’: Input/output error
1669369+0 records in
1669368+0 records out
854716416 bytes (855 MB) copied, 28.4799 s, 30.0 MB/s
[1] 24047 exit 1 dd if=/dev/zero of=/dev/sda2 bs=512
conv=notrunc
solfire:/home/user>
I am a little anxious about the hdparm command...
For me it is unclear what sector is meant:
smartclt says:
Num Test_Description Status Remaining
LifeTime(hours) LBA_of_first_error
# 1 Selective offline Completed: read failure 90%
14500 4288352511
From a previous posting I learned that "LBA" in this case is the byte
counter.
The sector is therefore 4288352511/512=8375688
However as a result of the dd command above I found this in the dmesg
log:
[48588.471905] end_request: I/O error, dev sda, sector 1773816
Now...what sector count fits what sector count ... ?
I will not fire zeroes towards my hd this way before I know exactly
to what I am shooting at... ;)
Any light in all this shadow is heartly appreciated...
Best regards,
mcc
Here a few observations: First, smartctl starts counting at the very
first sector of the drive
while dd starts counting at the first sector of the partition. So, find
out where the partition starts
by using fdisk and add the partition offset to the number given by dd.
Second, if your file system is ext{2,3,4} try using fsdebug as
described in
file:///home/jarausch/GenToo/Hints/Smartmontools_badblockhowto.html
Third, as far as I understand, smartctl's '-t select' option lets you
test
specific ranges of the disk. You could try to start the test after the
defective sector.
Helmut
