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On Tue, Jun 16, 2020, at 2:17 AM, Dale wrote: |
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> David Haller wrote: |
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> |
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> I mentioned once long ago that I keep a list of frequently used |
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> commands. I do that because, well, my memory at times isn't that great. |
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> Here is some commands I ran up on based on posts here and what google |
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> turned up when searching for things related on those posts. I wanted to |
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> share just in case it may help someone else. ;-) dd commands first. |
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> |
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> |
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> root@fireball / # cat /root/freq-commands | grep dd |
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> dd commands |
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> dd if=/dev/zero of=/dev/sd bs=4k conv=notrunc |
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> dd if=/dev/zero of=/dev/sd bs=4k conv=notrunc oflag=direct #disables cache |
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> dd if=/dev/zero of=/dev/sd bs=1M conv=notrunc |
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> dd if=<(yes $'\01' | tr -d "\n") of= |
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> dd if=<(yes $'\377' | tr -d "\n") of= |
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> dd if=<(yes $'\xFF' | tr -d "\n") of= |
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> root@fireball / # |
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> |
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> |
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> The target device or file needs to be added to the end of course on |
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> the last three. I tend to leave out some of the target to make sure I |
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> don't copy and paste something that ends badly. dd can end badly if |
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> targeting the wrong device. |
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> |
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> |
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> root@fireball / # cat /root/freq-commands | grep smartctl |
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> smartctl -t long /dev/sd |
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> smartctl -t full ##needs research |
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> smartctl -c -t short -d sat /dev/sd ##needs research |
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> smartctl -t conveyance -d sat /dev/sd ##needs research |
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> smartctl -l selftest -d sat /dev/sd ##needs research |
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> smartctl -t <short|long|conveyance|select> /dev/sd ##needs research |
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> smartctl -c /dev/sd ##displays test times in minutes |
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> smartctl -l selftest /dev/sd |
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> root@fireball / # |
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> |
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|
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Thanks for these. I do have a general question: has SMART actually shown |
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anyone predictive capability? In my use and in the use of 4-5 people I know |
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it only makes you aware of errors after the drive is failing but still online. |
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|
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I suppose there might be some utility if you're using an error correcting FS, |
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but for desktop use that was and still is somewhat abnormal. |