On Wed, 15 Jul 2020 00:20:33 +0100 Peter Kay <syllops...@syllopsium.co.uk> wrote:
> Configuration : Boot drive on SATA, other drives on LSI 3008 8i SAS in > JBOD, boot ROM disabled. The mpii driver gets very upset (causes a > kernel panic on boot, even though the boot drive is on SATA [1]) if > some of the drive bays aren't occupied, throws unhappy messages about > drives disappearing from bays, and generally doesn't provide any > confidence that I could ever remove a drive from a running system and > have it work. So the issue only happens when you remove drives from a live system? If that's the case, the obvious workaround would be to power off the system and then replace faulty drive. I've used "LSI 9260-8i" on NetBSD, but it's 6Gb/s per port and no JBOD. Not actually tried hotplugging with this card. The only issue with not having JBOD is the virtual disc provided by the card doesn't support SSD TRIM. The card has flexible config where you can disable cached I/O, etc, so data is passed directly to SSD without getting slowed down by onboard cache. I've not used ZFS with it, but I think configuring each disk individually in RAID0 and then passing them to ZFS would work. There is LSI binary Linux command line tool (MegaCli64), so I imagine you could offline/online individual disks, but you'd need Linux emulation packages setup on NetBSD.
