February 9, 20179 yr so ill be replacing a 4tb parity with a new 8tb drive ill be setting the old parity drive as a data drive whats the best practice?? can i set a new config with old parity included and build new parity or should i go step by step and build new parity first before adding back old parity as data drive??
February 9, 20179 yr Author the old 4tb parity will be replacing a 2tb data drive i should then wait for new parity to build before replacing the 2tb with old 4tb parity??
February 9, 20179 yr the old 4tb parity will be replacing a 2tb data drive i should then wait for new parity to build before replacing the 2tb with old 4tb parity?? So you want the 2T drive to no longer be in the array? Yes - you would simply upsize parity (replace 4T parity with 8T parity) and when that is finished, then use the old 4T parity disk to replace the 2T drive. The procedure I referenced should not be used (althought the steps about running parity checks and smart reports are still relevant). If your 2T drive is failing, I would have another recommendation.
February 9, 20179 yr Author ok great. sounds great. ill take those steps. 2tb is not failing. just out of space. case is limited so no room for extra drive.
February 9, 20179 yr ok great. sounds great. ill take those steps. 2tb is not failing. just out of space. case is limited so no room for extra drive. In would definitely suggest you have an extra slot to preclear a disk or support delicate recovery. Often a disk mounted outside the array is very helpful. Even if you are just running 1 or more SATA cables and power connectors out the back of the case to connect to a spare drive. (Would be nice to have in a small cage, but even using bare drives label side down works in a pinch - you just have to be very careful not to touch or disturb the drive). You really want to be set up for that so when the need arises, you are ready. Instead of having to open your server and go squirreling around when your array is in a delicate state and you'd rather not risk knocking something loose.
February 10, 20179 yr Author I have a seperate system running the preclear. ill be adding it to my system once it completes. i have hot swap cages so wont opening or fiddling around with cables thanks for the concern
February 10, 20179 yr I have a seperate system running the preclear. ill be adding it to my system once it completes. i have hot swap cages so wont opening or fiddling around with cables thanks for the concern Great! Let us know you your 2T drive replacement goes.
February 10, 20179 yr I have a question: I'm doing a new server and doing a bunch of parity drive upgrades myself. I'm curious, is it necessary to do the parity check before I do the drive switch if I've got all green lights on my drives and shares? I just ask since if I can avoid the 6 hour check that would be great.
February 10, 20179 yr Author I have a question: I'm doing a new server and doing a bunch of parity drive upgrades myself. I'm curious, is it necessary to do the parity check before I do the drive switch if I've got all green lights on my drives and shares? I just ask since if I can avoid the 6 hour check that would be great. when was the last time you completed a parity check?? 6 hour parity check is nothing. i suggest complete it. im at 18+hrs parity checks lol
February 10, 20179 yr I have a question: I'm doing a new server and doing a bunch of parity drive upgrades myself. I'm curious, is it necessary to do the parity check before I do the drive switch if I've got all green lights on my drives and shares? I just ask since if I can avoid the 6 hour check that would be great. A parity check is a way to verify that your parity is in sync with the data on its disk. In the process it reads each and every sector on each and every disk, and gives the SMART system on each drive a chance to verify that everything is readable. It is recommended to do monthly and before any major operation on your server. It is never "mandatory", but is a good idea. And a parity check after rebuilding a disk is recommended. If I was upsizing more than one disk, I'd likely do if differently. I'd mount the new disks outside the array (unassigned devices plugin is an option here), format the disks, copy data to them from their respective disks (using rsync to verify). When all this was done, I'd do one giant new config, and include all the new disks and exclude all of the old disks. This would be so much faster than replacing each disk in series and doing a parity check after each. This technique can be used to change the filesystem when upsizing too. You just format the new disk with xfs and copy all of the data from your rfs drive to the xfs drive. And then do a new config and include the xfs drive.
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