I remember reading that SAS2008 isn't too good with SSDs....

[kaheksajalg7]

as per title.. is that correct? And if so, in what context - it isn't good outright, or it only sucks if you're trying RAID5 etc?

I'm wanting to connect (2x) 2xSSDs in ZFS mirror, will SAS2008 suffice, or should I step up to SAS3008(? 9300-8i)?

cheers

 

[pricklypunter]

Depends on the SSD's and your use case, but generally speaking, PCIe 3.0 cards are better suited for SSD's due to the speed at which you can pull data off them. Either will work of course, but depending on the SSD's, you might bottleneck them. Of course, this all becomes academic if you only have PCIe 2.0 slots on your mainboard, or can't process the data fast enough anyway

 

[kaheksajalg7]

fair enough.. my use case is very very light load.. even using the word load is overkill

I'll be using both arrays for light file storage, with minimal data transfers etc

 

[pricklypunter]

Then you probably won't have any issues using a 2008 based card at the moment

 

[i386]

I'm wanting to connect (2x) 2xSSDs in ZFS mirror, will SAS2008 suffice, or should I step up to SAS3008(? 9300-8i)?

I would get a newer card, the sas2008 is almost 12 years old (released 2009!) and redhat removed the drivers in rhel 8 (removal of SAS-2 controller drivers in RHEL 8 - Red Hat Customer Portal) -> other distros will probably follow or did already.

PCIe 3.0 cards are better suited for SSD's due to the speed at which you can pull data off them.

Pcie 3.0 or sas3 hba/controllers? (adaptec series 7 hba/controllers use pcie 3.0 and sas2 )

 

[tasen01]

I have a ServerRaid M1015 HBA (SAS2008 Controller) flashed to IT-Mode
Tested with 5 x Samsung 870 EVO SSD in RaidZ1 and I could get around 900 - 1000 MB/s with 10GBE (SMB and iSCSI).
But TRIM could be a problemw with certain SSDs:

TRIM support, and any other issues to look out for in an all SSD pool?

I'm planning to build an all SSD pool for various storage (vm's, database, static files etc...), and I often run in to the TRIM-thing and garbage collection painted as a big issue with SSD's. I'm not sure if this information is obsolete or not. The FreeNAS documentation does not help me that...

www.truenas.com

SOLVED - SSD TRIM with LSI HBA and/or PCIe SSDs?

Hey everyone! I just got a DELL R720xd to upgrade from my R710. I am planning on adding some SSDs to be used as an iSCSI target for a new hypervisor system I am working on. I have come across many people that have problems with TRIM with LSI HBAs. I am planning on flashing the H310 mini mono...

www.truenas.com

 

[EffrafaxOfWug]

redhat removed the drivers in rhel 8 (removal of SAS-2 controller drivers in RHEL 8 - Red Hat Customer Portal) -> other distros will probably follow or did already.

I'm not sure if RH ever gave a technical reason for removing the drivers - they're certainly still present in the linux kernel and TTBOMK there's no plan on removing them in the short or medium term and I'm not aware of them being removed from any other distros.

As far as I'm aware, the older mpt2sas driver isn't used these days anyway; mpt3sas provides for both the SAS2 and SAS3 HBAs.

 

[kaheksajalg7]

I have a ServerRaid M1015 HBA (SAS2008 Controller) flashed to IT-Mode
Tested with 5 x Samsung 870 EVO SSD in RaidZ1 and I could get around 900 - 1000 MB/s with 10GBE (SMB and iSCSI).
But TRIM could be a problemw with certain SSDs:

TRIM support, and any other issues to look out for in an all SSD pool?

I'm planning to build an all SSD pool for various storage (vm's, database, static files etc...), and I often run in to the TRIM-thing and garbage collection painted as a big issue with SSD's. I'm not sure if this information is obsolete or not. The FreeNAS documentation does not help me that...

www.truenas.com

SOLVED - SSD TRIM with LSI HBA and/or PCIe SSDs?

Hey everyone! I just got a DELL R720xd to upgrade from my R710. I am planning on adding some SSDs to be used as an iSCSI target for a new hypervisor system I am working on. I have come across many people that have problems with TRIM with LSI HBAs. I am planning on flashing the H310 mini mono...

www.truenas.com

mmmm ok.. is there a list / wiki of SSDs that have this RZAT or DRAT? cheers

 

[tasen01]

mmmm ok.. is there a list / wiki of SSDs that have this RZAT or DRAT? cheers

I don't know if there is a wiki or list but most enterprise SSDs could or should support these feature. But don't blame if it's not true