LSI 9260 RAID0 (SSD) and RAID5 (HDD) settings
- Thread starter voodooFX
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You can find answers to this question in other threads. I post just summary here, although I have doubts about some of them:
Access: RW - well, this one is clear
Read: Ahead (for HDD), No read ahead (for SSD). This is also clear, as there is no "ahead" on SSD.
Disk cache: I'd recommend to put "enabled" for both SSD- as well as HDD-arrays, but there is a question about power-protection (especially for SSD, as they have quite big internal cache)
I/O: I have seen here "Direct" as recommended for SSD, but I do not understand why it should not be rather "cached"
Disable BGI: No (no reason to disable background initialization)
Default Write: "Drive Throug" is here mostly recommended for SSD-arrays, but I have some doubts about it. While it might be safe option, why not to use "Write Back" (at least "with BBU"), for both HDD and SSD? It could speed write-ops considerably...
Access: RW - well, this one is clear
Read: Ahead (for HDD), No read ahead (for SSD). This is also clear, as there is no "ahead" on SSD.
Disk cache: I'd recommend to put "enabled" for both SSD- as well as HDD-arrays, but there is a question about power-protection (especially for SSD, as they have quite big internal cache)
I/O: I have seen here "Direct" as recommended for SSD, but I do not understand why it should not be rather "cached"
Disable BGI: No (no reason to disable background initialization)
Default Write: "Drive Throug" is here mostly recommended for SSD-arrays, but I have some doubts about it. While it might be safe option, why not to use "Write Back" (at least "with BBU"), for both HDD and SSD? It could speed write-ops considerably...
voodooFX,
Did you succeed in getting the Intel 730 SSDs to work with RAID 5 with the LSI 9260? Reading through LSI/Avago's published compatibility list, I can't find any modern SSDs they support.
If you have the Intel 730's working well with this RAID controller, has the read/write performance been consistent over time? I've come across accounts of Samsung EVO and PRO not working well without TRIM, i.e., their internal garbage collection is not good. Sandforce controller based SSDs were known for good garbage collection but I don't know of any modern SSDs that are Sandforce based. Intel 520 SSDs were Sandforce based but you can't find them for a good price now as it's a very old model.
Anyone else who could recommend modern SSDs with good garbage collection, suitable for use in hardware RAID?
Did you succeed in getting the Intel 730 SSDs to work with RAID 5 with the LSI 9260? Reading through LSI/Avago's published compatibility list, I can't find any modern SSDs they support.
If you have the Intel 730's working well with this RAID controller, has the read/write performance been consistent over time? I've come across accounts of Samsung EVO and PRO not working well without TRIM, i.e., their internal garbage collection is not good. Sandforce controller based SSDs were known for good garbage collection but I don't know of any modern SSDs that are Sandforce based. Intel 520 SSDs were Sandforce based but you can't find them for a good price now as it's a very old model.
Anyone else who could recommend modern SSDs with good garbage collection, suitable for use in hardware RAID?