sto giocando con i dischi raid e lvm, sto studiando il tool mdadm.
ho fatto qualcosa eccovi i miei passi, faccio un riassunto spero di non dimenticare nulla se ci fossero incongruenze avvertitemi :
Codice: Seleziona tutto
sudo mdadm --create /dev/md0 --level=5 --raid-device=3 /dev/sdb1 /dev/sdc1 /dev/sdd1
mdadm: /dev/sdb1 appears to be part of a raid array:
level=raid5 devices=3 ctime=Wed May 5 15:50:14 2010
mdadm: /dev/sdc1 appears to be part of a raid array:
level=raid5 devices=3 ctime=Wed May 5 15:50:14 2010
mdadm: /dev/sdd1 appears to be part of a raid array:
level=raid5 devices=3 ctime=Wed May 5 15:50:14 2010
Continue creating array? y
mdadm: array /dev/md0 started.Codice: Seleziona tutto
cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 sdd1[2] sdc1[1] sdb1[0]
192512 blocks level 5, 64k chunk, algorithm 2 [3/3] [UUU]
unused devices: <none>Codice: Seleziona tutto
dmesg
[ 1028.272469] md: bind<sdb1>
[ 1028.289422] md: bind<sdc1>
[ 1028.308709] md: bind<sdd1>
[ 1028.477268] async_tx: api initialized (async)
[ 1028.492713] xor: automatically using best checksumming function: pIII_sse
[ 1028.512024] pIII_sse : 678.000 MB/sec
[ 1028.512027] xor: using function: pIII_sse (678.000 MB/sec)
[ 1028.728877] raid6: int32x1 908 MB/s
[ 1028.798453] raid6: int32x2 851 MB/s
[ 1028.864974] raid6: int32x4 706 MB/s
[ 1028.932554] raid6: int32x8 568 MB/s
[ 1029.001033] raid6: mmxx1 2328 MB/s
[ 1029.068063] raid6: mmxx2 2564 MB/s
[ 1029.136069] raid6: sse1x1 1556 MB/s
[ 1029.204088] raid6: sse1x2 2011 MB/s
[ 1029.272095] raid6: sse2x1 2501 MB/s
[ 1029.340077] raid6: sse2x2 2935 MB/s
[ 1029.340080] raid6: using algorithm sse2x2 (2935 MB/s)
[ 1029.523314] md: raid6 personality registered for level 6
[ 1029.523316] md: raid5 personality registered for level 5
[ 1029.523318] md: raid4 personality registered for level 4
[ 1029.524530] raid5: device sdc1 operational as raid disk 1
[ 1029.524533] raid5: device sdb1 operational as raid disk 0
[ 1029.525126] raid5: allocated 3179kB for md0
[ 1029.530998] 1: w=1 pa=0 pr=3 m=1 a=2 r=3 op1=0 op2=0
[ 1029.531006] 0: w=2 pa=0 pr=3 m=1 a=2 r=3 op1=0 op2=0
[ 1029.531008] raid5: raid level 5 set md0 active with 2 out of 3 devices, algorithm 2
[ 1029.531010] RAID5 conf printout:
[ 1029.531012] --- rd:3 wd:2
[ 1029.531014] disk 0, o:1, dev:sdb1
[ 1029.531016] disk 1, o:1, dev:sdc1
[ 1029.531065] md0: detected capacity change from 0 to 197132288
[ 1029.532756] md0: unknown partition table
[ 1029.538333] RAID5 conf printout:
[ 1029.538336] --- rd:3 wd:2
[ 1029.538337] disk 0, o:1, dev:sdb1
[ 1029.538339] disk 1, o:1, dev:sdc1
[ 1029.538340] disk 2, o:1, dev:sdd1
[ 1029.538893] md: recovery of RAID array md0
[ 1029.538895] md: minimum _guaranteed_ speed: 1000 KB/sec/disk.
[ 1029.538896] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for recovery.
[ 1029.538900] md: using 128k window, over a total of 96256 blocks.
[ 1049.233772] md: md0: recovery done.
[ 1049.413491] RAID5 conf printout:
[ 1049.413494] --- rd:3 wd:3
[ 1049.413496] disk 0, o:1, dev:sdb1
[ 1049.413498] disk 1, o:1, dev:sdc1
[ 1049.413500] disk 2, o:1, dev:sdd1Codice: Seleziona tutto
root@ubu001-desktop:~# echo DEVICE /dev/sdb1 /dev/sdc1 /dev/sdd1 > /etc/mdadm/mdadm.conf
root@ubu001-desktop:~# mdadm --detail --scan >> /etc/mdadm/mdadm.conf
root@ubu001-desktop:~# cat /etc/mdadm/mdadm.conf
DEVICE /dev/sdb1 /dev/sdc1 /dev/sdd1
ARRAY /dev/md0 level=raid5 num-devices=3 metadata=00.90 UUID=1ceb8a9b:46bd76cf:b5a565d6:04d2150dCodice: Seleziona tutto
Disco /dev/sdb: 104 MB, 104857600 byte
255 testine, 63 settori/tracce, 12 cilindri
Unità = cilindri di 16065 * 512 = 8225280 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x3fb021e7
Dispositivo Boot Start End Blocks Id System
/dev/sdb1 1 12 96358+ fd Autorilevamento raid di Linux
Disco /dev/sdc: 104 MB, 104857600 byte
255 testine, 63 settori/tracce, 12 cilindri
Unità = cilindri di 16065 * 512 = 8225280 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0xdeec9ae6
Dispositivo Boot Start End Blocks Id System
/dev/sdc1 1 12 96358+ fd Autorilevamento raid di Linux
Disco /dev/sdd: 104 MB, 104857600 byte
255 testine, 63 settori/tracce, 12 cilindri
Unità = cilindri di 16065 * 512 = 8225280 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x00073e21
Dispositivo Boot Start End Blocks Id System
/dev/sdd1 1 12 96358+ fd Autorilevamento raid di Linux
Disco /dev/md0: 197 MB, 197132288 byte
2 testine, 4 settori/tracce, 48128 cilindri
Unità = cilindri di 8 * 512 = 4096 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 65536 bytes / 131072 bytes
Identificativo disco: 0x2f467e02
Dispositivo Boot Start End Blocks Id SystemMi sono arenato qui.
Ciao
Lele
