Hey all and thanks in advance for replies.
To give some context I do lots of software development, particularly for applications dealing with large data sets. My workstation has been performing like a champ with basically no updates since ~2012. It is a ASRock x79 mobo with hex core I7 (LGA 2011, but not one of the Xeon processors, IIRC the Xeon ones have some interconnectivity features that this desktop processor does not have). Plain jane gfx.
What I have been dealing with lately is my storage array. Besides having a few oddball HDDs for archived storage (on various mobo SATA controllers) my main storage is 4x SSD running on a LSI 2008 RAID card (firmware and drivers just updated to the most recent) in RAID 10. Up until yesterday, the 4x SSD were all OCZ 120 gb drives from 2012, which had been running continuously since 2012. One finally started showing some signs of dying, and I had been meaning to expand my storage anyway, so I got 4x Mushkin Triactor 250 GB drives to replace em, again in a 4x SSD array on the LSI card. [As a side note, I had considered other solutions, but this looked like the best way to model a scaled down production database server]. So I got all the drives installed and cloned my old image, no issues at all with that. But, my performance numbers on the RAID array is not as expected. On the old array, I was getting around 600 MB/s seq write, 200 MB/s seq read, 350 and 200 MB/s on 512k, 30 and 60 MB/s (yes, write is faster than read, strange) on 4k, and 300 and 150 MB/s on 4kQD32. Back in 2012, I found this pretty spiffy. And I figured the 4k without depth was fine given that SSDs perform better with command queues for parallelism.
Fast forward to the new, 2017 drives. Seq and 512k reads improved pretty awesomely (to 1000 MB/s and 600 MB/s) and 4k read (both serial and QD32) improved a few MB/s. But my write speeds are utterly disappointing. Seq writes are at 130 MB/s, 512k at 100 MB/s, 4k at 7 mb/s (yeah, not missing any 0's), and 4kQD32 at 11. In other words, about half of the write performance as the 2012 drives for big writes and even slower for little writes.
Any ideas on what is going on here? I have heard that the LSI 2008 RAID card is not the best performer, but performance here seems even more crippled than expected, particularly given the decent numbers with the older drives.
To give some context I do lots of software development, particularly for applications dealing with large data sets. My workstation has been performing like a champ with basically no updates since ~2012. It is a ASRock x79 mobo with hex core I7 (LGA 2011, but not one of the Xeon processors, IIRC the Xeon ones have some interconnectivity features that this desktop processor does not have). Plain jane gfx.
What I have been dealing with lately is my storage array. Besides having a few oddball HDDs for archived storage (on various mobo SATA controllers) my main storage is 4x SSD running on a LSI 2008 RAID card (firmware and drivers just updated to the most recent) in RAID 10. Up until yesterday, the 4x SSD were all OCZ 120 gb drives from 2012, which had been running continuously since 2012. One finally started showing some signs of dying, and I had been meaning to expand my storage anyway, so I got 4x Mushkin Triactor 250 GB drives to replace em, again in a 4x SSD array on the LSI card. [As a side note, I had considered other solutions, but this looked like the best way to model a scaled down production database server]. So I got all the drives installed and cloned my old image, no issues at all with that. But, my performance numbers on the RAID array is not as expected. On the old array, I was getting around 600 MB/s seq write, 200 MB/s seq read, 350 and 200 MB/s on 512k, 30 and 60 MB/s (yes, write is faster than read, strange) on 4k, and 300 and 150 MB/s on 4kQD32. Back in 2012, I found this pretty spiffy. And I figured the 4k without depth was fine given that SSDs perform better with command queues for parallelism.
Fast forward to the new, 2017 drives. Seq and 512k reads improved pretty awesomely (to 1000 MB/s and 600 MB/s) and 4k read (both serial and QD32) improved a few MB/s. But my write speeds are utterly disappointing. Seq writes are at 130 MB/s, 512k at 100 MB/s, 4k at 7 mb/s (yeah, not missing any 0's), and 4kQD32 at 11. In other words, about half of the write performance as the 2012 drives for big writes and even slower for little writes.
Any ideas on what is going on here? I have heard that the LSI 2008 RAID card is not the best performer, but performance here seems even more crippled than expected, particularly given the decent numbers with the older drives.