Supermicro Sas1 sas826el1 expander with 3tb hdd

[carlos juan]

Hello! I'm preparing to expand my freenas (raidz2 6x 3tb hdd) and bought a sc826el barebone chassis with a 826el1 backplane expander. I will use a h310 IT

I found out that this expander is just a sas1 expander, and, there seems to be problems with supermicro expanders and >2tb hdd.

Is there anyone that can shine some light into actually puting 3tb disk to this backplane?, it uses a lsisasX28 chip, which is quite old. To make things worse, two of my disk are Seagate 3tb consumer drives.

I could just try putting my pool disks in that backplane but I'm scared that it could corrupt my pool. Should I dump all this and wait until I can buy a sas2826el1 expander? For the sake of my pool.

Thanks!

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[Jailer]

If you already have a pool created with drives larger than 2TB I wouldn't connect them to that backplane.

 

[carlos juan]

If you already have a pool created with drives larger than 2TB I wouldn't connect them to that backplane.

Ok! Thank you! What about using a sas2826el1, will it be safe to plug my drives with my already created pool in that backplane? It's a sas2 backplane with an expander.

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[Chris Moore]

Ok! Thank you! What about using a sas2826el1, will it be safe to plug my drives with my already created pool in that backplane? It's a sas2 backplane with an expander.

SAS2 supports the larger drives. Should be fine.

 

[Chris Moore]

I found out that this expander is just a sas1 expander, and, there seems to be problems with supermicro expanders and >2tb hdd.

It isn't Supermicro, it is SAS1 (older standard) that did not support drives larger than 2TB.

 

[carlos juan]

It isn't Supermicro, it is SAS1 (older standard) that did not support drives larger than 2TB.

Fair enough, I have to say, that by the stuff I read, there seems to be more people having problems with supermicro backplanes and Seagate consumer hdd than others manufacturers and I was referring to that though. As I value my data I will wait until I can just buy the sas2826el1 backplane and be done with this, Almost all I read points to having problems or that it might or might not work, thanks for the heads-up.

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[Ericloewe]

It isn't Supermicro, it is SAS1 (older standard) that did not support drives larger than 2TB.

It's not inherent to SAS1. LSI just cheaped out and truncated the 48-bit LBA to 32-bit in silicon, presumably to reuse a cheap 32-bit CPU core without needing wider registers to accommodate the extra 16 bits.