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