December 7, 201213 yr Hi all, Running 5.0rc5 Currently have: 1 x 3TB Parity Data Drives: 1 x 3TB 4 x 1.5TB I'm upgrading the 1.5TB drives to 2TB drives, and all the drives are pre cleared. I'm in the process of upgrading the first disk now. I ran two parity checks, and both came out totally clean. Then I ran a preclear on the new 2TB disks. Then I stopped the array, pulled out one of the 1.5TB disks, and put in a precleared 2TB disk, and it is rebuilding now. Once this 2TB disk is upgraded, I'm assuming I just need to run another non correcting parity check, before I upgrade the next 1.5TB disk. Is this correct? Thanks! -Marcus
December 7, 201213 yr Author Yes. Thanks! First rebuild done, and running a parity check now. I must say, I wasn't so sure about the rebuild process..... almost as if I was taking a big risk to see if it would work, as opposed to just bringing another disk online in the array and copying the content over. But it actually works pretty well! From a theoretical standpoint as long as the parity drive always checks out, and a parity check has no erors, mathematically it will always rebuild. The only exceptions would be in the event of catastrophic failure of another drive, right? It all ends up being math, and as long as the parity is fine, the math will always be correct <with the assumption that no drives will die during the rebuild>. Thanks!
December 7, 201213 yr I had the same process. Swap out the hdd to replace, start engine and than it is rebuilding. If that is done on a valid parity system, i thought it should be 100% after the re-built. But it runs a parity check anyway. Better save than sorry i guess.
December 7, 201213 yr Make a copy of the config folder before each rebuild. This will allow recovery if a second disk should fail while rebuilding.
December 7, 201213 yr Author Make a copy of the config folder before each rebuild. This will allow recovery if a second disk should fail while rebuilding. Good call. I did not do this on the first drive, or the one going right now. But I will do that tomorrow for drives 3 and 4. Thanks!
December 7, 201213 yr A couple notes: - It's not strictly necessary to run 'pre-clear' on new hard drives. People just do it to sanity check that the disk is working. That is to say, it's not necessary for the 'upgrade' procedure to use a pre-cleared disk. - Similarly, it's not necessary to run a 'parity check' after upgrade has completed. You can if you want but it's not necessary for the 'upgrade' procedure.
December 7, 201213 yr Author A couple notes: - It's not strictly necessary to run 'pre-clear' on new hard drives. People just do it to sanity check that the disk is working. That is to say, it's not necessary for the 'upgrade' procedure to use a pre-cleared disk. - Similarly, it's not necessary to run a 'parity check' after upgrade has completed. You can if you want but it's not necessary for the 'upgrade' procedure. Thanks for that! I think with some of the issues listed lately with some 3TB drives I made sure to do it for those drives to have a bit more confidence in the drives. The 2TB drives I am adding were previously used in a Synology DS-410 so they needed to be tested and pre-cleared. Are there any plans to eventually raise the 20 data drive limit? Does that limit currently exist because of Sata Controller connection or power limitations? Thanks! -Marcus
December 7, 201213 yr A couple notes: - It's not strictly necessary to run 'pre-clear' on new hard drives. People just do it to sanity check that the disk is working. That is to say, it's not necessary for the 'upgrade' procedure to use a pre-cleared disk. - Similarly, it's not necessary to run a 'parity check' after upgrade has completed. You can if you want but it's not necessary for the 'upgrade' procedure. Thanks for that! I think with some of the issues listed lately with some 3TB drives I made sure to do it for those drives to have a bit more confidence in the drives. The 2TB drives I am adding were previously used in a Synology DS-410 so they needed to be tested and pre-cleared. Are there any plans to eventually raise the 20 data drive limit? Does that limit currently exist because of Sata Controller connection or power limitations? Thanks! -Marcus From the release notes: Cummulative changes from 5.0-rc5/-rc-6-xxx/-rc7 to 5.0-rc8 ---------------------------------------------------------- - driver: increase maximum number of array disks from 21 to 24
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