Dear Santa, thank you for the dolls and pencils and the fish. It's Easter now, so I hope I didn't wake you but... honest, it is an emergency. There's a crack in my wall. Aunt Sharon says it's just an ordinary crack, but I know its not cause at night there's voices so... please please can you send someone to fix it? Or a policeman, or...
Back in a moment.
Thank you Santa.
Back in a moment.
Thank you Santa.
Friday, January 08
New Server: Sakura
I have a new server, Sakura, to handle backups for the mununiverse. It has 32TB of disk, arranged as two independent 8TB RAID-1 volumes. The previous backup server (also named Sakura) had 6TB RAID-5, so 16TB RAID-1 is quite an upgrade. And the new server is slightly cheaper.
I have a new server, Sakura, to handle backups for the mununiverse. It has 32TB of disk, arranged as two independent 8TB RAID-1 volumes. The previous backup server (also named Sakura) had 6TB RAID-5, so 16TB RAID-1 is quite an upgrade. And the new server is slightly cheaper.
Only downside is the new Sakura has shingles. That is, it uses shingled disk drives, where the tracks actually overlap. This works because drive read heads are smaller than write heads, and can accurately read the half-sized tracks. But it means that you can't overwrite a single sector; you have to read a whole group of tracks, change the bits you want, and write the whole lot back.
Sequential performance is just fine - 160MB/sec on both reads and writes. Random access is fine, even great, up to a point. The drives have a 20GB buffer area for random writes, which works extremely well - several times faster than a normal disk drive.
But I can't recommend doing an OS update while a RAID rebuild is running. That seems to be pushing things a bit too far.
Posted by: Pixy Misa at
03:44 PM
| No Comments
| Add Comment
| Trackbacks (Suck)
Post contains 188 words, total size 1 kb.
<< Page 1 of 1 >>
46kb generated in CPU 0.0122, elapsed 0.1933 seconds.
49 queries taking 0.1856 seconds, 339 records returned.
Powered by Minx 1.1.6c-pink.
49 queries taking 0.1856 seconds, 339 records returned.
Powered by Minx 1.1.6c-pink.
