starcat Posted November 19, 2023 Share Posted November 19, 2023 Hi guys, I am running unRaid version 6.9.2 and last time I added a precleared disk, the array didn't notice it is already precleared and started recalculating parity again. What is the proper way of letting the array know a precleared disk will be added, so it do not need to recalculate the parity? Thanks! PS: I am using a pretty old Joe L. preclear_disk.sh v1.7 on a different (version 4.7) server, which actually shouldn't matter, no? Quote Link to comment
itimpi Posted November 19, 2023 Share Posted November 19, 2023 41 minutes ago, starcat said: Hi guys, I am running unRaid version 6.9.2 and last time I added a precleared disk, the array didn't notice it is already precleared and started recalculating parity again. What is the proper way of letting the array know a precleared disk will be added, so it do not need to recalculate the parity? Thanks! PS: I am using a pretty old Joe L. preclear_disk.sh v1.7 on a different (version 4.7) server, which actually shouldn't matter, no? It should 'just work' and as far as I know the version used is irrelevant as long as it completes without any error. Make sure you do not do anything to the disk after the preclear completes or this will destroy the preclear signature. A common mistake is to try formatting the disk before adding it to the array. Quote Link to comment
starcat Posted November 19, 2023 Author Share Posted November 19, 2023 No, not all, not doing anything. Just pre-clear and inserting the pre-cleared disk into the production array. Thanks for confirmation, was thinking I am missing something. Quote Link to comment
Frank1940 Posted November 19, 2023 Share Posted November 19, 2023 As I seem to recall, there was an issue with the 'preclear signature' being written to the wrong sector that could cause Unraid not to recognize a precleared disk as precleared. And this was back in the Days when Joe L. was still active on the forum. I have forgotten all the details as they were technical in nature. Quote Link to comment
starcat Posted November 19, 2023 Author Share Posted November 19, 2023 Ok, I see, so probably my preclear_disk.sh v1.7 isn't writing the proper signature and the disk do not get recognized as pre-cleared in the newer array. Which version or other tool do I need to write a signature to the disk (it is already pre-cleared with the old script). Btw, what happened to Joe L., must have been at least 10 years.. Quote Link to comment
itimpi Posted November 19, 2023 Share Posted November 19, 2023 17 minutes ago, starcat said: Which version or other tool do I need to write a signature to the disk (it is already pre-cleared with the old script) I would suggest you use the UD version of Preclear nowadays. Not sure you can ‘just’ write the Preclear signature, but you could just run the write phase. Quote Link to comment
starcat Posted November 19, 2023 Author Share Posted November 19, 2023 Thanks a lot guys! Quote Link to comment
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