warbaque

We have 20+ year old Miele for our heavy duty cleaning and we are looking for a secondary machine for quick spot cleaning.

Dyson V11 is going for 399€ at the moment, but I'm a bit hesitant thanks to all less than stellar reviews I've been reading lately about dyson. So all recommendations are welcome (EU) :)

edit: TL;DR; keep your drives cool!

Write speeds

• 20-30 MB/s @ 65C
• 95-155 MB/s @ 55-60C

I still need to figure out if they are also faulty or will Error_Rate go down once I get them cooler

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I finally got around getting 2 new drives (2 x 16TB) Seagate Exos X18 (ST16000NM000J-2TW103)

Issue is that they are running pretty hot (65C) and write speeds are abysmal.

I get new fans tomorrow to cool them down, but can temperature have such an impact with HDD write speeds? (YES, temperature had a huge impact) Or are these just faulty on arrival?

Old array (/mnt/storage) for comparison vs new disks (/mnt/sd{d,e})

Temperature @ 65C

write speed (20-35 MB/s is way less t

I finally got around getting 2 new drives (2 x 16TB) Seagate Exos X18 (ST16000NM000J-2TW103)

Issue is that they are running pretty hot (65C) and write speeds are abysmal.

I get new fans tomorrow, but can temperature have such an impact with hdd write speeds? Or are these just faulty on arrival?

Old array (/mnt/storage) for comparison vs new disks (/mnt/sd{d,e})

write speed (30 MB/s is way less than these should be capable of)

❯ sudo dd if=/dev/zero of=/mnt/storage/test.img bs=1G count=1 oflag=dsync
1+0 records in
1+0 records out
1073741824 bytes (1,1 GB, 1,0 GiB) copied, 5,0528 s, 213 MB/s

❯ sudo dd if=/dev/zero of=/mnt/sdd/test.img bs=1G count=1 oflag=d

Current setup is 2x16TB + 2x8TB, and once I need more room I'll add a new pair or replace smallest pair.

Any opinions or recommendations? Most of the time I'll be running with 6 disks or fewer.

I've been using mdadm raid5 (with btrfs on top of it for checksums) on my homeserver for years, and I've been mostly happy with it. It's been cost efficient and easy to use, but replacing array with larger disks have been pain in the ass.

I am now rebuilding my setup, and I've been thinking that maybe simplest setup would be to use one pool where I add mirrored disks under it so each pair of disks will have some redundancy and disks would be pretty simple to replace as pairs. Instead of rebuilding

Before

After

Ammo (per biter) : bullets to kill single biter
Ammo (total)     : bullets to kill all biters
Magazines        : magazines kill all biters
Extra Biters     : biters spawning from ammo production pollution
%                : extra pollution
% (cascading)    : extra pollution total effect
Cost (total)     : resources it takes to kill all biters

Before the latest piercing ammo balance (2.0.46), it was always cheaper and more cost effective to continue using yellow ammo. On low resource deathworlds it was actually detrimenta