I bought a Dell server some time ago and put 3 15k SAS drives in it for the root drive. I wanted to switch the root to use SSD's. The T610 has 8 front slots (only 3 are used now -- for the boot/OS drive). So I though to put the SSD's into 4 of the other 8 slots.
First thing that happened was the alert light turned from its normal blue to orange. and said there as a fault in the disks. Nevertheless I brought the OS up, and was able to access, format and use the SSD's normally. After them staying up for a few months, but still afraid to put data on them, finally unplugged them. I went to try them again at some later point, but this time it seemed to knock the 3 SAS drives offline -- and this was disturbing...the SSD's appeared to shadow the SAS drives (note, controller handles SAS or SATA) and ended up crashing the system. Uncool!
So I'd still like to switch, at least the 3SAS drives out and put the OS on the SSD's, but with the warning lights, I'm not so sure (even though they used to function correctly. And last time I tried them...they seemed to cause problems.
Why would SSD's not be compatible with SATA or SAS drives? (Of note, I can place other SATA drives. Thanks much!
Update: Please note -- "I was able to access, format and use the SSD's normally". The controller on linux reads as an LSI Logic / Symbios Logic MegaRAID SAS 1078. It's a 3Gb compat, that handles SAS and SATA. I loaded it up with a copy of what was on the SAS. I used the LSI GUI, "MegaRaid Storage Manager". According to it, there was no problem with the disk nor the RAID10 I setup with them. It was only the external LCD that seemed to be the output of Dell's management and diagnosis chip.
As far as the disk controller went -- it had an embedded license to allow SSD's to be added for the purpose of using a feature 'Cache-Cascade', I think -- using the SSD's as a cache for the HD's. It recognized the SSD's as being SSD's, but indicated no problem with either the SSD's nor the RAID setup with them.
I.e. indicated the health of the RAID as "OK". It seemed it was the management controller that was doing the complaining.
Note that the same controller did note that the 15k SAS drives I have installed are not "Dell-certified" drives (yeah, they have a longer warrantee), but that didn't prevent them being used.
Also of note -- I bought a 2nd LSI controller for 2 external bays of multi-TB SATA's. It didn't have the SSD licence and refuses to power-up an SSD saying it is an unauthorized disk. From a controller standpoint -- it seems it won't allow an SSD to be used if the controller isn't licensed for them (second controller MegaRAID SAS 2208 [Thunderbolt]).
First thing that happened was the alert light turned from its normal blue to orange. and said there as a fault in the disks. Nevertheless I brought the OS up, and was able to access, format and use the SSD's normally. After them staying up for a few months, but still afraid to put data on them, finally unplugged them. I went to try them again at some later point, but this time it seemed to knock the 3 SAS drives offline -- and this was disturbing...the SSD's appeared to shadow the SAS drives (note, controller handles SAS or SATA) and ended up crashing the system. Uncool!
So I'd still like to switch, at least the 3SAS drives out and put the OS on the SSD's, but with the warning lights, I'm not so sure (even though they used to function correctly. And last time I tried them...they seemed to cause problems.
Why would SSD's not be compatible with SATA or SAS drives? (Of note, I can place other SATA drives. Thanks much!
Update: Please note -- "I was able to access, format and use the SSD's normally". The controller on linux reads as an LSI Logic / Symbios Logic MegaRAID SAS 1078. It's a 3Gb compat, that handles SAS and SATA. I loaded it up with a copy of what was on the SAS. I used the LSI GUI, "MegaRaid Storage Manager". According to it, there was no problem with the disk nor the RAID10 I setup with them. It was only the external LCD that seemed to be the output of Dell's management and diagnosis chip.
As far as the disk controller went -- it had an embedded license to allow SSD's to be added for the purpose of using a feature 'Cache-Cascade', I think -- using the SSD's as a cache for the HD's. It recognized the SSD's as being SSD's, but indicated no problem with either the SSD's nor the RAID setup with them.
I.e. indicated the health of the RAID as "OK". It seemed it was the management controller that was doing the complaining.
Note that the same controller did note that the 15k SAS drives I have installed are not "Dell-certified" drives (yeah, they have a longer warrantee), but that didn't prevent them being used.
Also of note -- I bought a 2nd LSI controller for 2 external bays of multi-TB SATA's. It didn't have the SSD licence and refuses to power-up an SSD saying it is an unauthorized disk. From a controller standpoint -- it seems it won't allow an SSD to be used if the controller isn't licensed for them (second controller MegaRAID SAS 2208 [Thunderbolt]).
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