On Fri, Jun 24, 2022 at 08:35:31AM -0400, John Mellor wrote: > On 2022-06-23 23:04, ToddAndMargo via users wrote: > > Any of you guys know of a PCIe card that will do > > hardware RAID 1 with two NVMe drives? > > > > I have found some, but they are way to elaborate, > > and as such, way too expensive. > > Maybe you have a weird hardware requirement that explains the question, but > why do you want a RAID-1 card?� Software RAID is much cheaper, faster, uses > less power and is considerably more reliable.� If you run BTRFS or ZFS, then > it is also easier on the drives, and recovery times are hundreds of times > lower than what you can do with hardware.� That translates directly into > hundreds of times better reliability numbers.� Best of all, you do not need > matching drives or drive sizes to implement RAID-1.� For a long time now, > the only reason to run hardware RAID has been underneath back-level versions > of Windows or VMware.
When I last tried about two years ago, using RAID-5 via LVM with no file system I was unable to come close to maximum performance for sequential only writes, where you do not need to read data off of the disks - it was still reading and writing. I couldn't find any details on how to get this to work or if it was possible. I tried tuning various settings (I can't recall specifics, but generally increasing the memory it uses) but with little change in performance. -- Patrick _______________________________________________ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
