Author name: Dan Langille

I've been playing with computers since I read an Elementary Electronics magazine way back in the 1970s. I started contributing to open source projects in 1998. After that, I gradually moved from being a software developer to being a systems administrator.

Compression results

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 »

GEOM: nda1: the primary GPT table is corrupt or invalid

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 »

Experimenting with compression=zstd

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 »

Experimenting with compression=lz4

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 »

Experimenting with compression off

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 »

Adding in new NVMe cards and sticks – and replacing two SSDs

I notice I also worked with some SSDs at the end of this post – I have since amended the title of this post. In this post: FreeBSD 14.3 Today I removed two existing NVMe cards, each with a 1TB stick on it. Those sticks were added to these cards: If you want the same hardware, you can use these links. As an Amazon Associate I earn from qualifying purchases. These are all

Adding in new NVMe cards and sticks – and replacing two SSDs Read More »

Leveling out the NVMe cards on the adaptors

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 »

r730-01: the drive replacement plan

This post is mostly for my benefit, so I can keep track of my plan for adjusting space. It doesn’t contain much of educational value. One recent day, I powered off r730-01 and took inventory of the 16 drive bays. A short overview: [17:36 r730-01 dvl ~] % zpool list NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT data01 5.81T 2.84T 2.97T – – 1% 48% 1.00x ONLINE – data02

r730-01: the drive replacement plan Read More »

Cannot override /etc/newsyslog.conf with /etc/newsyslog.conf.d/newsyslog.conf

FreeBSD has a great concept of establishing default values and letting the user override them. That approach does not apply to newsyslog, and specifically, newsyslog.conf This idea came up on IRC after I said I was looking forward to a new FreeBSD 15 which allows the compression specified in newsyslog.conf to be overridden. Using /etc/newsyslog.conf.d Getting a clean copy First, I grabbed a pristine copy of /etc/newsyslog.conf from the repo: [12:34 r730-01 dvl

Cannot override /etc/newsyslog.conf with /etc/newsyslog.conf.d/newsyslog.conf Read More »

Dell R730 – The session has timed out waiting for verification of the certificate – slot bifurcation details – plus NVMe plans

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

Dell R730 – The session has timed out waiting for verification of the certificate – slot bifurcation details – plus NVMe plans Read More »

Scroll to Top