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Re: Hybrid HDDs on ReadyNAS Ultra 2
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2015-06-28
02:49 PM
2015-06-28
02:49 PM
Hybrid HDDs on ReadyNAS Ultra 2
Hi,
I would like to know if there is any problem (e.g. wear out faster, performance will degrade fast, as TRIM isn't supported, ...) if I use Hybrid HDD (e.g. SATA3 2.0TB SEAGATE SSHD HYBRID 64M ST2000DX001) on ReadyNAS Ultra 2 (the price is not a problem).
Thanks
I would like to know if there is any problem (e.g. wear out faster, performance will degrade fast, as TRIM isn't supported, ...) if I use Hybrid HDD (e.g. SATA3 2.0TB SEAGATE SSHD HYBRID 64M ST2000DX001) on ReadyNAS Ultra 2 (the price is not a problem).
Thanks
Message 1 of 5
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2015-06-28
02:57 PM
2015-06-28
02:57 PM
Re: Hybrid HDDs on ReadyNAS Ultra 2
There aren't any on the compatibility list.
What do you expect to gain? The limiting factor for data transfer is the gigabit Ethernet,
What do you expect to gain? The limiting factor for data transfer is the gigabit Ethernet,
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2015-06-28
06:04 PM
2015-06-28
06:04 PM
Re: Hybrid HDDs on ReadyNAS Ultra 2
SSHD drives are mechanical drives with a large (8 GB) cache, so TRIM isn't relevant. Whether that cache helps performance much depends on the workload (random I/O on a small working set probably would be faster, since performance would be disk-bound, not network bound).
I haven't seen any test results of SSHDs in RAID-5 or RAID-6 though.
Also, the mechanical drive mechanism of the ST2000DX001 is believed similar to the DM drives, which don't seem to fare that well in NAS RAID arrays. So personally I wouldn't use them.
I haven't seen any test results of SSHDs in RAID-5 or RAID-6 though.
Also, the mechanical drive mechanism of the ST2000DX001 is believed similar to the DM drives, which don't seem to fare that well in NAS RAID arrays. So personally I wouldn't use them.
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2015-07-05
07:44 AM
2015-07-05
07:44 AM
Re: Hybrid HDDs on ReadyNAS Ultra 2
I am not relay looking for performance gain, but more for reliability, since SSHD use less the mechanical (headers). The most used files are hold on the cash side (SSD).
I have also used ST2000DM001 in RAID for a few years without any problem.
Since the price is almost the same (HD vs SSHD) I would like to use SSHD. Actually the question is: can SSHD be worse than HD on ReadyNAS Ultra 2 ?
Thanks
I have also used ST2000DM001 in RAID for a few years without any problem.
Since the price is almost the same (HD vs SSHD) I would like to use SSHD. Actually the question is: can SSHD be worse than HD on ReadyNAS Ultra 2 ?
Thanks
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2015-07-05
09:18 AM
2015-07-05
09:18 AM
Re: Hybrid HDDs on ReadyNAS Ultra 2
I don't think they will perform worse than the ST2000DM001s. Not sure about reliability (or whether your thinking about less wear will turn out to be true in practice).
In a larger NAS there could be issues due to vibration,but I don't see that as a problem on the Ultra-1.
These are just guesses though, since no one using these disks replied.
In a larger NAS there could be issues due to vibration,but I don't see that as a problem on the Ultra-1.
These are just guesses though, since no one using these disks replied.
Message 5 of 5