Let’s tally up. For reference, this is one of a series of posts regarding compression testing on zpools: Experimenting with compression off Experimenting with compression=lz4 Experimenting with compression=zstd Compression results – you are here Samsung-SSD-870 4TB SSD For the Samsung-SSD-870 4TB SSD no compression we had: 2:34 = 154s 2:32 = 152s 2:30 = 150s 3:52 = 238s 4:46 = 286s 4:16 = 256s 4:15 = 255s 4:15 = 255s 4:49 = 289s […]
Compression results Read More »
When I destroyed the zpools when I was done with zstd compression testing, these errors appeared in /var/log/messages: You’d be shocked to learn these messages appear when creating a zpool with those devices: [12:21 r730-01 dvl ~/tmp] % sudo zpool create Samsung-SSD-980-PRO-geom-issues mirror /dev/nda1 /dev/nda2 re: Background: these two devices were part of a zpool before I started playing with them. They had partitions on them. Recovery and destroy There may be a
GEOM: nda1: the primary GPT table is corrupt or invalid Read More »
Following on from my previous post where I tested lz4, let’s try compression=zstd. Experimenting with compression off Experimenting with compression=lz4 Experimenting with compression=zstd – you are here Compression results First, we delete the old: [21:19 r730-01 dvl ~/tmp] % sudo zpool destroy Samsung-SSD-870-compression-lz4 [21:19 r730-01 dvl ~/tmp] % sudo zpool destroy Samsung-SSD-980-PRO-compression-lz4 [21:19 r730-01 dvl ~/tmp] % sudo zpool destroy Samsung-SSD-990-EVO-compression-lz4 Then create the new: [21:19 r730-01 dvl ~/tmp] % sudo zpool create
Experimenting with compression=zstd Read More »
Following on from my previous post where I tested with compress off, let’s try compression=lz4. Experimenting with compression off Experimenting with compression=lz4 – you are here Experimenting with compression=zstd Compression results First, we delete the old: [19:45 r730-01 dvl ~] % sudo zpool destroy Samsung-SSD-870-no-compression [19:45 r730-01 dvl ~] % sudo zpool destroy Samsung-SSD-980-PRO-no-compression [19:46 r730-01 dvl ~] % sudo zpool destroy Samsung-SSD-990-EVO-no-compression [19:46 r730-01 dvl ~] % Then create the new: [19:47
Experimenting with compression=lz4 Read More »
Now that the new storage is in place, I thought to test with compression on and off. Perhaps also use both lz4 and zstd. For reference, this is one of a series of posts regarding compression testing on zpools: Experimenting with compression off – you are here Experimenting with compression=lz4 Experimenting with compression=zstd Compression results My plan: create three zpools of two mirrored devices and test. There will be three posts: compression off,
Experimenting with compression off Read More »
I recently obtained two 4TB NVMe cards and two PCIe adapters, each of which holds two NVMe cards. This is what they looked like fully loaded: The thinner NVMe is the new 4TB card, and the thicker card is the 1TB card, with heatsink, which I’ve had for some time. Yesterday I noticed the NVMe cards were not parallel with the adaptor. Earlier today, I fixed that. First, let’s look at the angles.
Leveling out the NVMe cards on the adaptors Read More »
Today I was trying to access my Dell 730 (r730-01) via the remote console. I failed. Twice. First and expected failure First, this was usual and expected. It’s been a problem both at home and at work. It is the inability to access the console via https using the hostname This is what I see: I can get in via IP address though. Second and new-to-me failure Next, after logging in via IP
Recently I’ve been playing with NVMe to find out more about monitoring for wear. Tried nvme-cli: [17:49 r730-01 dvl ~] % nvme list Failed to scan topology: No such file or directory Seems it is a known problem. Went with this instead: [17:52 r730-01 dvl ~] % sudo nvmecontrol devlist nvme0: Samsung SSD 980 PRO with Heatsink 1TB nvme0ns1 (953869MB) nvme1: Samsung SSD 980 PRO with Heatsink 1TB nvme1ns1 (953869MB) With more information
Finding out more about nvme on FreeBSD Read More »
Yesterday I did some scavenging of some servers which I’m going to dispose of. I managed to put together 4 x 1TB storage devices: 2 x NVMe sticks and 2 x SSDs. I also pulled a riser card from an R730 and relocated it to another host. The NVMe sticks are mounted on these PCIe cards, which I do not regret buying. They came with full height and low-profile brackets. More to the
Moving 4x storage devices into a new home Read More »
This was written a few weeks ago and I just noticed today that it had not been published. Following on from I bought a new nvme drive – or did I?, I ran stressdisk on it. [dvl@test ~]$ sudo gpart add -a 4k -t freebsd-zfs nvd0 nvd0p1 added [dvl@test ~]$ gpart show nvd0 => 34 500118125 nvd0 GPT (238G) 34 6 – free – (3.0K) 40 500118112 1 freebsd-zfs (238G) 500118152 7 –