I actually think that the low write rate of the Samsung consumer SSDs is a rather good sign for the firmware implementation of the drives. When a cheap consumer class SSD like the Kingston v300 or the Intel 535 can achieve such a high sustained random 4K performance I get skeptical. Such a...
I use that exact setup, so I definitely know it works. And you won't need the sideband, as the sideband info will be transmitted in-band from the controller to the expander. The sideband is required if you connect the backplane directly to the controller and want to control the LEDs.
dd is not a benchmark. You have no control over syncs and queue depths. There is a post from me in this subforum how to use fio to properly benchmark sequential write speed.
Are you sure you should get more an an encrypted block device? The processor is somewhat old and does not have hardware...
Usually all drives 7200rpm and higher will exceed proper operating conditions (~50°C) without active cooling.
There are a few exceptions, notably cases where they are screwed to more solid metal parts.
How can proc be using space? It is a virtual filesystem not located on disk.
Unless Solaris/OpenIndiana works completely different than any *nix I ever used.
please post the output of
zfs list -r -t all rpool
du -h -x -d 1 /
(note that I use mainly Linux and do not know whether the...
The M.2 850 EVO is a SATA drive, it will not work in a PCIe-only slot.
Your options are Plextor M6e, Samsung XP941, Samsung SM951 and the HyperX Predator.
All three are good with the SM951 as the fastest.
I'm not sure something like that exists.
There are some copy stations around, but you would need something that is filesystem-aware.
I do not know of a single one that is.
My solution to your problem would be a well scripted/automated PC with some hotswap trays.
Resizing filesystems with bad...
A single fast PCIe SSD like the Intel P3700 will blow any caching solution out of the water. If you need redundancy buy two and make a RAID1.
Caching only makes sense if the footprint of the workload fits on the SSD cache.
This drive has not been around long enough to make such assessment.
I personally considered them as "storage" SSD for my server, but 850 EVO has much better burst and random read performance for almost the same price.
Is there a reason to replace the 840 EVO? If you do it because of the read...
The MTBF values are too similar to be based on actual failure rates.
Maybe they calculate them based on the failure rates of the individual parts. A a simple mistake in the firmware can destroy a drive much faster.
The 840 EVO still has one of the best price/GB ratios around.
Samsung drives seem to are very resilient against sudden power loss. I had to replace a MX100 in a specific laptop that often had filesystem corruption or bluescreens after suspend-to-disk. Since I replaced the drive by an 840 EVO...