I have direct experience with SATA SSDs used for RBD with an active public
cloud (QEMU/KVM) workload. Drives rated ~ 1 DWPD after 3+ years of service
consistently reported <10% of lifetime used.
SMART lifetime counters are often (always?) based on rated PE cycles, which I
would expect to be mo
Yes, we were a little bit concerned about the write endurence of those
drives. There are SSD with much higher DWPD endurance, but we expected
that we would not need the higher endurance. So we decided not to pay
the extra price.
Turns out to have been a good guess. (educated guess, but still)
> This depends on how the write cache is implemented and where the cache is.
Exactly!
> With many caching controllers as the controller is the end device that you
> connect to at an OS level then you can get substantial performance increases
> by having the cache enabled.
A couple of years
This depends on how the write cache is implemented and where the cache is.
If its on a caching controller that has a BBU then it depends on what happens
when a f_sync is issued.
If it forces the write to go down to the underlying devices then it could be a
bad thing.
With many caching controll
On Mon, Nov 22, 2021 at 4:52 PM Nico Schottelius
wrote:
>
>
> Peter Lieven writes:
> > Whatever SSD you choose, look if they support power-loss-protection and
> > make sure you disable the write cache.
>
> I have read this statement multiple times now, but I am still puzzled by
> the disabling w
Am 22.11.21 um 16:25 schrieb Luke Hall:
> On 22/11/2021 15:18, mj wrote:
>> Hi,
>>
>> We were in the same position as you, and replaced our 24 4TB harddisks with
>> Samsung PM883 .
>>
>> They seem to work quite nicely, and their wearout (after one year) is still
>> at 1% for our use.
>
> Thanks,
On 22/11/2021 15:18, mj wrote:
Hi,
We were in the same position as you, and replaced our 24 4TB harddisks
with Samsung PM883 .
They seem to work quite nicely, and their wearout (after one year) is
still at 1% for our use.
Thanks, that's really useful to know.
Op 22-11-2021 om 13:57 schre
Hi,
We were in the same position as you, and replaced our 24 4TB harddisks
with Samsung PM883 .
They seem to work quite nicely, and their wearout (after one year) is
still at 1% for our use.
MJ
Op 22-11-2021 om 13:57 schreef Luke Hall:
Hello,
We are looking to replace the 36 aging 4TB HD
On 22/11/2021 12:59, Martin Verges wrote:
As the price for SSDs is the same regardless of the interface, I would
not invest so much money in a still slow and outdated platform.
Just buy some new chassis as well and go NVMe. It adds only a little
cost but will increase performance drastically.
As the price for SSDs is the same regardless of the interface, I would not
invest so much money in a still slow and outdated platform.
Just buy some new chassis as well and go NVMe. It adds only a little cost
but will increase performance drastically.
--
Martin Verges
Managing director
Mobile: +4
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