hardware

zfs: setting compression and adding new vdevs

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If you read my recent posts, I’m replacing an existing zpool with new devices. At first, I went to copy the old zpool to a new zpool. I then decided instead of copying, to replace. I’m also going to see about compression. I’m sure it won’t take effect, because replace is a block-by-block copy, or so I think. We’ll confirm. Before Here is the zpool, really, just the top-level filesystem. Notice how compression […]

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Moving a zpool to new devices – after the syncoid copy – oh wait, zfs replace

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This morning, as I was typing the subject of this blog post, I realized I don’t have to do this copying. The new devices are staying in this host. It is better for me to add the new devices to the zpool and remove the old devices. That is so much easier. The existing zpool can stay in use and there is no interruption in service. NOTE: after publishing this entry, I realized

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Compression results

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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

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

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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

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Experimenting with compression=zstd

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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

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Experimenting with compression=lz4

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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

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Experimenting with compression off

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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,

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

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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

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Leveling out the NVMe cards on the adaptors

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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.

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r730-01: the drive replacement plan

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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. For what I actually did, see zfs: setting compression and adding new vdevs 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

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