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ZFS High-Availability NAS
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Are Dual Ported SAS drives required for both systems to be connected to the backplane? #20

Closed ACiDGRiM closed 5 years ago

ACiDGRiM commented 6 years ago

I'm trying to get this setup in a lab at home, with less redundancy, but would like to ensure the services are always available via the controllers. I know I'm probably trying to make something work that won't, but is this possible with a single path and using SATA drives? Or at most Single Port SAS?

In my current setup I'm trying, once I connect the other controller to the backplane, the first controller fails to access any of the SATA drives on the backplane, and there are no auto mounts. I've used your guide for another ZFS system to get pacemaker to work on a DRBD replicated pool, so just a stab in the dark if you can shed some light in this new configuration I'm trying.

rcproam commented 6 years ago

@ACiDGRiM you would still need a SAS enclosure with a dual-port SAS backplane and a SAS HBA in each node, but you could theoretically get by with SATA drives if you connect SATA to dual-port SAS interposer cards/modules. IIRC Dell and SuperMicro offer interposer modules to connect SATA drives in their SAS enclosures. I suspect HP might offer them also, but it looks like Edmund has a lot more experience with HP hardware than I

Regards,

Ryan

On Aug 3, 2018, at 1:47 AM, ACiDGRiM notifications@github.com<mailto:notifications@github.com> wrote:

I'm trying to get this setup in a lab at home, with less redundancy, but would like to ensure the services are always available via the controllers. I know I'm probably trying to make something work that won't, but is this possible with a single path and using SATA drives? Or at most Single Port SAS?

In my current setup I'm trying, once I connect the other controller to the backplane, the first controller fails to access any of the SATA drives on the backplane, and there are no auto mounts. I've used your guide for another ZFS system to get pacemaker to work on a DRBD replicated pool, so just a stab in the dark if you can shed some light in this new configuration I'm trying.

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