coolspot Posted July 5, 2018 Share Posted July 5, 2018 (edited) Hi all, Â I'm contemplating getting a JBOD enclosure to host an additional set of disks rather than get a large Supermicro chassis... but one thing was worrying me is how unRAID would handle the JBOD chassis going offline? Â For example, power fails on the JBOD chassis, unRAID would report these disks as offline. Â But assuming there was no data transfer, on next reboot, I bring the chassis back online, do a parity check, would the system pass? Afterall, multiple drives would have gone offline. Â In short, how does unRAID respond to multiple disks going offline temporarily? Â Thanks. Edited July 5, 2018 by coolspot Quote Link to comment
JorgeB Posted July 6, 2018 Share Posted July 6, 2018 10 hours ago, coolspot said: how does unRAID respond to multiple disks going offline temporarily? If it tries to access them, and it could do that even if you don't write anything to them, it will disable as many disks as parity disks there are. 1 Quote Link to comment
Christopher W. Posted October 1, 2022 Share Posted October 1, 2022 @JorgeB so what would happen if 4 drives are offline and i only have 1 parity? Does the array stop then? How would I be able to get the array working? As far as I know i have to rebuild every disabled disk. But if i only have 1 parity and 4 drives were missing what would happen then?  I am considering a JBOD and do not want to lose data if the JBOD loses connection (power or cable)  Best regards  Quote Link to comment
JorgeB Posted October 2, 2022 Share Posted October 2, 2022 12 hours ago, Christopher W. said: Â so what would happen if 4 drives are offline and i only have 1 parity? Does the array stop then? All dropped devices would be unaccessible. Â 12 hours ago, Christopher W. said: How would I be able to get the array working? Power down or reboot as needed to bring the devices back online, at most only one disk would be disabled. Quote Link to comment
Christopher W. Posted October 2, 2022 Share Posted October 2, 2022 @JorgeBÂ thank you! 1 Quote Link to comment
trurl Posted October 2, 2022 Share Posted October 2, 2022 What exactly do you mean by JBOD enclosure? Does it use SAS connection? Quote Link to comment
Christopher W. Posted October 3, 2022 Share Posted October 3, 2022 20 hours ago, trurl said: What exactly do you mean by JBOD enclosure? Does it use SAS connection? Yes. I will use a HBA in IT mode with external interfaces and get some sff8088 cables to connect the drives  Quote Link to comment
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