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Dale wrote: |
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> Howdy, |
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> |
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> I finally bought a 8TB drive. It is used but they claim only a short |
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> duration. Still, I want to test it to be sure it is in grade A shape |
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> before putting a lot of data on it and depending on it. I am familiar |
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> with some tools already. I know about SMART but it is not always |
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> 100%. It seems to catch most problems but not all. I'm familiar with |
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> dd and writing all zeores or random to it to see if it can in fact |
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> write to all the parts of the drive but it is slow. It can take a long |
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> time to write and fill up a 8TB drive. Days maybe?? I googled and |
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> found a new tool but not sure how accurate it is since I've never used |
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> it before. The command is badblocks. It is installed on my system so |
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> I'm just curious as to what it will catch that others won't. Is it |
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> fast or slow like dd? |
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> |
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> I plan to run the SMART test anyway. It'll take several hours but I'd |
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> like to run some other test to catch errors that SMART may miss. If |
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> there is such a tool that does that. If you bought a used drive, what |
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> would you run other than the long version of SMART and its test? |
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> Would you spend the time to dd the whole drive? Would badblocks be a |
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> better tool? Is there another better tool for this? |
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> |
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> While I'm at it, when running dd, I have zero and random in /dev. |
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> Where does a person obtain a one? In other words, I can write all |
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> zeros, I can write all random but I can't write all ones since it |
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> isn't in /dev. Does that even exist? Can I create it myself |
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> somehow? Can I download it or install it somehow? I been curious |
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> about that for a good long while now. I just never remember to ask. |
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> |
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> When I add this 8TB drive to /home, I'll have 14TBs of space. If I |
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> leave the 3TB drive in instead of swapping it out, I could have about |
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> 17TBs of space. O_O |
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> |
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> Thanks to all. |
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> |
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> Dale |
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> |
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> :-) :-) |
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Update. I got a lot of info and suggestions from the replies. Thanks |
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to all for those. The drive has passed all the test so far. I ran a |
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short and long SMART selftest. Results: |
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root@fireball / # smartctl -l selftest /dev/sde |
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smartctl 7.0 2018-12-30 r4883 [x86_64-linux-5.6.7-gentoo] (local build) |
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Copyright (C) 2002-18, Bruce Allen, Christian Franke, www.smartmontools.org |
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|
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=== START OF READ SMART DATA SECTION === |
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SMART Self-test log structure revision number 1 |
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Num Test_Description Status Remaining |
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LifeTime(hours) LBA_of_first_error |
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# 1 Short offline Completed without error 00% |
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24592 - |
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# 2 Extended offline Completed without error 00% |
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24592 - |
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# 3 Short offline Completed without error 00% |
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24213 - |
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# 4 Short offline Completed without error 00% |
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23493 - |
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# 5 Short offline Completed without error 00% |
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22749 - |
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# 6 Short offline Completed without error 00% |
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22054 - |
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# 7 Short offline Completed without error 00% |
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21310 - |
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# 8 Short offline Completed without error 00% |
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20566 - |
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# 9 Short offline Completed without error 00% |
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19846 - |
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#10 Short offline Completed without error 00% |
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19101 - |
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#11 Short offline Completed without error 00% |
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18381 - |
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#12 Short offline Completed without error 00% |
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17637 - |
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#13 Short offline Completed without error 00% |
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16893 - |
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#14 Short offline Completed without error 00% |
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16173 - |
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#15 Short offline Completed without error 00% |
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12108 - |
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#16 Short offline Completed without error 00% |
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11940 - |
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#17 Short offline Completed without error 00% |
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11772 - |
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#18 Short offline Completed without error 00% |
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11604 - |
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#19 Short offline Completed without error 00% |
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11436 - |
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#20 Short offline Completed without error 00% |
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11268 - |
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#21 Short offline Completed without error 00% |
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11100 - |
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root@fireball / # |
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I then ran badblocks to test it. This is the results of it. |
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root@fireball / # badblocks -b 4096 -s -v /dev/sde |
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Checking blocks 0 to 1953506645 |
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Checking for bad blocks (read-only test): |
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done |
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Pass completed, 0 bad blocks found. (0/0/0 errors) |
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root@fireball / # |
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It doesn't show it now but I had it show the progress including run |
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time. It took about 15 hours to run on this 8TB drive. If anyone wants |
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to test a drive in the future, that may help estimate the amount of time |
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to run this test. |
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I tried the conveyance test but this drive doesn't support it. Since it |
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shows no errors and it passed the SMART tests as well, I'm thinking it |
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is time to put data on the thing. Off to the LVM manual. |
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Thanks to all for the tips, tricks and suggestions. |
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Dale |
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:-) :-) |
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