Those figures are often inaccurate as the actual results can vary wildly
based of if the device FW thinks there is actual data on the sectors
being TRIM'ed.
Regards
Steve
On 20/07/2015 12:06, Will Green wrote:
I wonder if this is connected to NVMe?
Our SATA Intel DC S3500 drives (which are not that different to the 750s) TRIM
much more quickly.
What does camcontrol think the secure erase time should be? For a 600GB S3500
camcontrol accurately gives the secure erase time as 4 minutes:
# camcontrol security ada0
erase time 4 min
enhanced erase time 4 min
Trimming drives before addition to a system is definitely worthwhile.
Will
On 20 Jul 2015, at 10:28, Steven Hartland <kill...@multiplay.co.uk> wrote:
This will almost certainly be due to slow TRIM support on the device.
Try setting the sysctl vfs.zfs.vdev.trim_on_init to 0 before adding the devices.
On 18/07/2015 05:35, dy...@techtangents.com wrote:
Hi,
I've installed an Intel 750 400GB NVMe PCIe SSD in a Dell R320 running FreeBSD
10.2-beta-1... not STABLE, but not far behind, I think. Apologies if this is
the wrong mailing list, or if this has been fixed in STABLE since the beta.
Anyway, I've gparted it into 2 partitions - 16GB for slog/zil and 357GB for
l2arc. Adding the slog partition to the pool takes about 2 minutes - machine
seems hung during that time. Ping works, but I can't open another ssh session.
Adding the l2arc doesn't seem to complete - it's been going 10 minutes now and
nothing. Ping works, but I can't log in to the local console or another ssh
session.
I'm adding the partitions using their gpt names. i.e.
zpool add zroot log gpt/slog
zpool add zroot cache gpt/l2arc
The system BIOS is up-to-date. The OS was a fresh 10.1 install, then
freebsd-update to 10.2-beta2. 10.1 exhibited the same symptoms.
Root is on zfs.
Device was tested to be working on Windows 8.1 on a Dell T1700 workstation.
Any ideas?
Cheers,
Dylan Just
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