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Forum Discussion
engine411
Aug 07, 2013Aspirant
2100 and SSD's
Several years ago, using SSD's in RAID was not recommended because the RAID controllers tended not to support TRIM and garbage collection on the SSD's. What is the current advice for using SSD's in a ReadyNAS 2100 with latest firmware? Can the NAS work with SSD's?
I was looking at the new Intel S3500 series. I have four 1-terabyte 7200 RPM SATA drives in RAID10 in the 2100 currently, and the two NIC's are teamed via LACP. Are my current drives capable of saturating the NIC team already? What are benefits and/or disadvantages of using SSD's in a RAID array in this NAS? Basically, I want to max out this NAS in terms of throughput (not just speed, but IOPS), and I'm curious how best to do that. My network and servers can handle higher speeds, right now the NAS is the slowest part of my network.
I was looking at the new Intel S3500 series. I have four 1-terabyte 7200 RPM SATA drives in RAID10 in the 2100 currently, and the two NIC's are teamed via LACP. Are my current drives capable of saturating the NIC team already? What are benefits and/or disadvantages of using SSD's in a RAID array in this NAS? Basically, I want to max out this NAS in terms of throughput (not just speed, but IOPS), and I'm curious how best to do that. My network and servers can handle higher speeds, right now the NAS is the slowest part of my network.
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- mdgm-ntgrNETGEAR Employee RetiredNo, a single NIC of the two was in use for those tests.
- StephenBGuru - Experienced User
For sequential I/O (large files) the answer probably depends on the details of the RAID mode and the traditional disks you are comparing the SSDs with.engine411 wrote: Another way of asking it is, with the current hard drives, if the NAS is completely maxed out in throughput while moving data (not writing, but reading), which component is maxed out and holding it from allowing any more throughput? The NICs or the drives?
For small files, directory browsing/searching, database updates (other non-sequential access), then SSDs should make a huge difference since they have no latency when seeking. That would be your IOPS / throughput distinction. If you want to maximize IOPS, then SSDs are what you want (assuming you can afford them).
Of course SSDs would eliminate any possibility of the drives being the bottleneck (no matter what the I/O load mix looks like).
BTW, I am not convinced there is much benefit to configuring SSDs into a RAID array - I don't think their failure modes are well matched to raid protection. So you might consider jbod if you go with SSDs. The main downside is that you need to balance the capacity across the disks manually. As always, if you care about your data, you need a backup plan.
BTW2, though most studies show that with traditional drives, reliability of enterprise and consumer models are quite similar, that is not the case with SSD. SLC drives [generally targeted for enterprise] are faster and more reliable than MLC [targeted for consumer]. The number of write cycles is much higher with SLC. - engine411Aspirant
For small files, directory browsing/searching, database updates (other non-sequential access), then SSDs should make a huge difference since they have no latency when seeking. That would be your IOPS / throughput distinction. If you want to maximize IOPS, then SSDs are what you want (assuming you can afford them).
This is our use scenario. I will research this further. Thanks. - StephenBGuru - Experienced UserGiven the price of the SSD drives, you might consider getting a new OS6 NAS, and leaving your 2100 in place (perhaps as a backup, or for users who mainly need bulk storage).
Then your config is supported by Netgear, and you could perhaps start with fewer SSDs and add them over time. Also, you could use the standard trays, and wouldn't need to track down carriers.
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