02-13-2016
Not directly related but i had a longer workshop yesterday about our new storage system (EMC VMax 200k). EMC claims that they had intended the 300GB 15k-SAS drives for high-performance, but phase them out now because (quoting from memory) with the development of Flash-SSDs its just not worth it any more. They also claim that, because they use SLC-based hardware, they have even lower rates of disk-replacement, even in heavy-duty transactional storage systems, than with rotational disks, to which a much lower energy consumption of the SSDs compared to the 15k-SAS disks contributes. There is simply less heat involved and that shows when you pack some ~2500 disks into a rack.
You haven't said where you are going to place the workstation, but in case it is going to be somewhere near your desk: 15k-disks are awefully LOUD in addition to be premier heating devices while SSDs are completely silent.
I hope this helps.
bakunin
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NVD(4) BSD Kernel Interfaces Manual NVD(4)
NAME
nvd -- NVM Express disk driver
SYNOPSIS
To compile this driver into your kernel, place the following lines in your kernel configuration file:
device nvme
device nvd
Or, to load the driver as a module at boot, place the following lines in loader.conf(5):
nvme_load="YES"
nvd_load="YES"
DESCRIPTION
The nvd driver exposes NVM Express (NVMe) namespaces as disks to the kernel disk storage API. It depends on the nvme(4) driver for notifica-
tion of existing NVMe namespaces and submission of NVM I/O commands.
Device nodes from the nvd driver will have the format /dev/nvdX and are GEOM(4) disks which can be partitioned by geom(8). Note that device
nodes from the nvme(4) driver are not GEOM(4) disks and cannot be partitioned.
SEE ALSO
GEOM(4), nvme(4), geom(8), nvmecontrol(8), disk(9)
HISTORY
The nvd driver first appeared in FreeBSD 9.2.
AUTHORS
The nvd driver was developed by Intel and originally written by Jim Harris <jimharris@FreeBSD.org>, with contributions from Joe Golio at EMC.
This man page was written by Jim Harris <jimharris@FreeBSD.org>.
BSD
March 18, 2014 BSD