raid6 striping complete. now the hail mary migration begins ...
turns out that ugreen simply doesn't have a raid6 migration flow lmao so i'm copying data to literally every drive in the house and praying none of them die (copying rare stuff to two drives)
March 11, 2026 at 5:12 AM
raid6 striping complete. now the hail mary migration begins ...
Rather than preemptively buy a platform for my new home server, I'm upcycling my old desktop with new purchases:
- Fractal Meshify 2 XL
- 10x 12TB drives in RAID6/Z2
- AMD 5950X (32 threads, 20 4.0X lanes)
- 64GB RAM
- LSI 9300-16i in HBA
- GTX3090 for LLM (second 3090 needs new mobo due to lanes)
- Fractal Meshify 2 XL
- 10x 12TB drives in RAID6/Z2
- AMD 5950X (32 threads, 20 4.0X lanes)
- 64GB RAM
- LSI 9300-16i in HBA
- GTX3090 for LLM (second 3090 needs new mobo due to lanes)
May 12, 2025 at 5:02 AM
Rather than preemptively buy a platform for my new home server, I'm upcycling my old desktop with new purchases:
- Fractal Meshify 2 XL
- 10x 12TB drives in RAID6/Z2
- AMD 5950X (32 threads, 20 4.0X lanes)
- 64GB RAM
- LSI 9300-16i in HBA
- GTX3090 for LLM (second 3090 needs new mobo due to lanes)
- Fractal Meshify 2 XL
- 10x 12TB drives in RAID6/Z2
- AMD 5950X (32 threads, 20 4.0X lanes)
- 64GB RAM
- LSI 9300-16i in HBA
- GTX3090 for LLM (second 3090 needs new mobo due to lanes)
Ich habe meinen Backup-Server upgegradet: von 4x4TB auf 4x18TB (RAID6).
Lasset die Daten kommen. 😬
Lasset die Daten kommen. 😬
October 24, 2024 at 2:35 PM
Ich habe meinen Backup-Server upgegradet: von 4x4TB auf 4x18TB (RAID6).
Lasset die Daten kommen. 😬
Lasset die Daten kommen. 😬
家全部RAID6 XEON E5だからどんぴしゃがぞうすぎてKUSOわらうｗｗｗ🦊🐾←
March 18, 2024 at 2:43 PM
家全部RAID6 XEON E5だからどんぴしゃがぞうすぎてKUSOわらうｗｗｗ🦊🐾←
apparently the internet just lies and ugos doesn't let you migrate raid5 -> raid6 when you add a drive so i guess i'm rebuilding it all again 🤪 i will attempt 3 drives in raid1 to 4 drives in raid6 i guess
March 6, 2026 at 6:12 AM
apparently the internet just lies and ugos doesn't let you migrate raid5 -> raid6 when you add a drive so i guess i'm rebuilding it all again 🤪 i will attempt 3 drives in raid1 to 4 drives in raid6 i guess
Western Digital hat seit Ende Oktober eine defekte HDD von mir in Geiselhaft und macht nichts damit. Weder bekomme ich Informationen noch eine neue Festplatte, WTF Leute?
Die fehlt in einem RAID6 und es wäre echt cool, eine neue zu kriegen... 😅
Deren Support: unnötig, schickt nur Textbausteine. 😠
Die fehlt in einem RAID6 und es wäre echt cool, eine neue zu kriegen... 😅
Deren Support: unnötig, schickt nur Textbausteine. 😠
December 10, 2025 at 9:45 PM
Western Digital hat seit Ende Oktober eine defekte HDD von mir in Geiselhaft und macht nichts damit. Weder bekomme ich Informationen noch eine neue Festplatte, WTF Leute?
Die fehlt in einem RAID6 und es wäre echt cool, eine neue zu kriegen... 😅
Deren Support: unnötig, schickt nur Textbausteine. 😠
Die fehlt in einem RAID6 und es wäre echt cool, eine neue zu kriegen... 😅
Deren Support: unnötig, schickt nur Textbausteine. 😠
turns out that ugreen simply doesn't have a raid6 migration flow lmao so i'm copying data to literally every drive in the house and praying none of them die (copying rare stuff to two drives)
March 8, 2026 at 6:59 AM
turns out that ugreen simply doesn't have a raid6 migration flow lmao so i'm copying data to literally every drive in the house and praying none of them die (copying rare stuff to two drives)
A colleague yesterday discovered that, because we added btrfs to our guest kernel, that pulled in CONFIG_RAID6_PQ. Which seemed harmless.
But it turns out that triggers a per-boot benchmark(!) of RAID6 algorithms. On every boot.
But it turns out that triggers a per-boot benchmark(!) of RAID6 algorithms. On every boot.
May 7, 2026 at 2:52 PM
A colleague yesterday discovered that, because we added btrfs to our guest kernel, that pulled in CONFIG_RAID6_PQ. Which seemed harmless.
But it turns out that triggers a per-boot benchmark(!) of RAID6 algorithms. On every boot.
But it turns out that triggers a per-boot benchmark(!) of RAID6 algorithms. On every boot.
i had accumulated 7.4tb of stuff up to that point and now have 21.2 total tb of raid6 storage (12tb drive x 4), so i've only taken up about 1/3rd of my total space
March 13, 2026 at 4:43 AM
i had accumulated 7.4tb of stuff up to that point and now have 21.2 total tb of raid6 storage (12tb drive x 4), so i've only taken up about 1/3rd of my total space
Weirdest setup I've ever built on my local desktop:
raid6+btrfs holds subvolume with postgres database.
On boot, systemd creates a zram block device and initializes it with btrfs. Then send()s the latest snapshot of the postgres subvolume to the in-ram btrfs.
raid6+btrfs holds subvolume with postgres database.
On boot, systemd creates a zram block device and initializes it with btrfs. Then send()s the latest snapshot of the postgres subvolume to the in-ram btrfs.
September 26, 2026 at 2:03 AM
Weirdest setup I've ever built on my local desktop:
raid6+btrfs holds subvolume with postgres database.
On boot, systemd creates a zram block device and initializes it with btrfs. Then send()s the latest snapshot of the postgres subvolume to the in-ram btrfs.
raid6+btrfs holds subvolume with postgres database.
On boot, systemd creates a zram block device and initializes it with btrfs. Then send()s the latest snapshot of the postgres subvolume to the in-ram btrfs.
Але ж це важливі дані, а на роботі raid6...
December 19, 2025 at 8:16 PM
Але ж це важливі дані, а на роботі raid6...
Internetbrain - my NAS is old. It works perfectly atm but this month it turned ten years old - it's a nice 5-bay Synology.
I could upgrade a couple of drives for a lot more capacity (4, 6, 8, 8, 8 in it atm, Raid6 treating all as 4TB), or go a new NAS with all new drives.
What would you do?
I could upgrade a couple of drives for a lot more capacity (4, 6, 8, 8, 8 in it atm, Raid6 treating all as 4TB), or go a new NAS with all new drives.
What would you do?
January 28, 2026 at 9:57 PM
Internetbrain - my NAS is old. It works perfectly atm but this month it turned ten years old - it's a nice 5-bay Synology.
I could upgrade a couple of drives for a lot more capacity (4, 6, 8, 8, 8 in it atm, Raid6 treating all as 4TB), or go a new NAS with all new drives.
What would you do?
I could upgrade a couple of drives for a lot more capacity (4, 6, 8, 8, 8 in it atm, Raid6 treating all as 4TB), or go a new NAS with all new drives.
What would you do?
postgres lives in compressed ram.
Every 5 minutes, the subvolume in RAM is snapshotted and send() to the btrfs on the raid6
snapshot retention on your typical hourly/daily/weekly/monthly rotation.
I get disgustingly fast postgres with rolling backups and a 5m data loss window.
Every 5 minutes, the subvolume in RAM is snapshotted and send() to the btrfs on the raid6
snapshot retention on your typical hourly/daily/weekly/monthly rotation.
I get disgustingly fast postgres with rolling backups and a 5m data loss window.
September 26, 2026 at 2:03 AM
postgres lives in compressed ram.
Every 5 minutes, the subvolume in RAM is snapshotted and send() to the btrfs on the raid6
snapshot retention on your typical hourly/daily/weekly/monthly rotation.
I get disgustingly fast postgres with rolling backups and a 5m data loss window.
Every 5 minutes, the subvolume in RAM is snapshotted and send() to the btrfs on the raid6
snapshot retention on your typical hourly/daily/weekly/monthly rotation.
I get disgustingly fast postgres with rolling backups and a 5m data loss window.
🚀 ZimaOS 1.4.2 Preview:
🔸 Now adds RAID6 & JBOD to existing RAID0/1/5 support
🔸 Smarter disk combining and future-proof expansion
🔸 Clean, intuitive UI for effortless setup
#ZimaOS #RAID6 #JBOD #NAS #SelfHosting #ZimaBoard #HomeLab #DataStorage #StorageSolutions #UPDATE #Linux
🔸 Now adds RAID6 & JBOD to existing RAID0/1/5 support
🔸 Smarter disk combining and future-proof expansion
🔸 Clean, intuitive UI for effortless setup
#ZimaOS #RAID6 #JBOD #NAS #SelfHosting #ZimaBoard #HomeLab #DataStorage #StorageSolutions #UPDATE #Linux
June 9, 2025 at 10:13 AM
🚀 ZimaOS 1.4.2 Preview:
🔸 Now adds RAID6 & JBOD to existing RAID0/1/5 support
🔸 Smarter disk combining and future-proof expansion
🔸 Clean, intuitive UI for effortless setup
#ZimaOS #RAID6 #JBOD #NAS #SelfHosting #ZimaBoard #HomeLab #DataStorage #StorageSolutions #UPDATE #Linux
🔸 Now adds RAID6 & JBOD to existing RAID0/1/5 support
🔸 Smarter disk combining and future-proof expansion
🔸 Clean, intuitive UI for effortless setup
#ZimaOS #RAID6 #JBOD #NAS #SelfHosting #ZimaBoard #HomeLab #DataStorage #StorageSolutions #UPDATE #Linux
legacy. this raid6 is like 7 years old at this point. i ran a raid5 before that
November 6, 2025 at 9:09 PM
legacy. this raid6 is like 7 years old at this point. i ran a raid5 before that
That's why you build a homelab with 16TB and realize that you didn't need that much (even in raid6)
August 5, 2025 at 7:22 AM
That's why you build a homelab with 16TB and realize that you didn't need that much (even in raid6)
Now I’m waiting for storage to come down so I can replace the 6x2TB RAID5 for a 4x8TB RAID6
June 19, 2026 at 2:28 PM
Now I’m waiting for storage to come down so I can replace the 6x2TB RAID5 for a 4x8TB RAID6
this has given me a fright despite RAID6 having our backs —
what are ppl using these days for cheap secondary archiving w/ infrequent access? S3 Glacier? some university thing? #psychscisky #neuroskyence 🧪
we have 20-30TB I'd really like to not lose in the event of a catastrophic failure
what are ppl using these days for cheap secondary archiving w/ infrequent access? S3 Glacier? some university thing? #psychscisky #neuroskyence 🧪
we have 20-30TB I'd really like to not lose in the event of a catastrophic failure
physical equipment for science is wild
we've had an enterprise grade server with a 12-drive RAID array running 24/7/365 for the last 8 years. this week one of the 12 drives failed
I guess a hard drive can only spin so long. RIP
we've had an enterprise grade server with a 12-drive RAID array running 24/7/365 for the last 8 years. this week one of the 12 drives failed
I guess a hard drive can only spin so long. RIP
April 29, 2024 at 7:42 PM
this has given me a fright despite RAID6 having our backs —
what are ppl using these days for cheap secondary archiving w/ infrequent access? S3 Glacier? some university thing? #psychscisky #neuroskyence 🧪
we have 20-30TB I'd really like to not lose in the event of a catastrophic failure
what are ppl using these days for cheap secondary archiving w/ infrequent access? S3 Glacier? some university thing? #psychscisky #neuroskyence 🧪
we have 20-30TB I'd really like to not lose in the event of a catastrophic failure
S'il vous plaît, RAID6 ! 💪🔥
August 30, 2025 at 2:25 AM
S'il vous plaît, RAID6 ! 💪🔥
I use truenas core. With mirrored OS drives and got 8 16TB nas pro reds for the pool about 89TBs with raidZ2 its likr raid6 yet Linux. Got it tunneled also so i can remote to it yet my upload sucks so its kind of ok
December 3, 2023 at 3:37 AM
I use truenas core. With mirrored OS drives and got 8 16TB nas pro reds for the pool about 89TBs with raidZ2 its likr raid6 yet Linux. Got it tunneled also so i can remote to it yet my upload sucks so its kind of ok
Linux 7.4 Slated To Land The AVX-512 Optimized xor_gen For A Big Performance Win - https://www.phoronix.com/news/Linux-7.4-Land-AVX-512-xor-gen
Linux 7.4 Slated To Land The AVX-512 Optimized xor_gen For A Big Performance Win
Over the past few months there have been patches floating around for an AVX-512 optimized xor_gen() for the Linux kernel for that functuon used by the Linux software RAID code. It's been shhowing very nice performance gains with this function being used for generating and validating parity blocks such as for RAID5 and RAID6. The upcoming Linux 7.4 cycle is slated to merge this nice enhancement for benefiting AMD Zen 4 and newer or current Intel server CPUs with AVX-512...
www.phoronix.com
September 16, 2026 at 12:59 AM
Linux 7.4 Slated To Land The AVX-512 Optimized xor_gen For A Big Performance Win - https://www.phoronix.com/news/Linux-7.4-Land-AVX-512-xor-gen
Revised AVX-512 xor_gen() Implementation For Linux RAID Yielding More Performance Gains - https://www.phoronix.com/news/AVX-512-Xor-Gen-More-Perf
Revised AVX-512 xor_gen() Implementation For Linux RAID Yielding More Performance Gains
A few days back I wrote about Google's Eric Biggers spearheading an AVX-512 implementation of xor_gen() as the Linux kernel function used for generating and validating parity blocks such as for RAID5/RAID6. That initial implementation was yielding up to 41% better performance while a new implementation has now been posted for scoring some additional victories...
www.phoronix.com
June 14, 2026 at 10:30 AM
Revised AVX-512 xor_gen() Implementation For Linux RAID Yielding More Performance Gains - https://www.phoronix.com/news/AVX-512-Xor-Gen-More-Perf
I never thought I'd see a RAID6 array fail after a single disk failure but here I am 😔
October 19, 2023 at 2:32 PM
I never thought I'd see a RAID6 array fail after a single disk failure but here I am 😔