$ cat /proc/mdstat Personalities : [raid1] read_ahead 1024 sectors md3 : active raid1 hdg3[1] hde3[0] 56894080 blocks [2/2] [UU] [>....................] resync = 4.2% (2418372/56894080) finish=24.9min speed=36422K/sec md2 : active raid1 hdc3[1] hda3[0] 56894080 blocks [2/2] [UU] [=======>.............] resync = 37.0% (21059712/56894080) finish=22.8min speed=26088K/sec md0 : active raid1 hdc1[0] hda1[1] 1052160 blocks [2/2] [UU] md1 : active raid1 hdc2[0] hda2[1] 2104448 blocks [2/2] [UU] unused devices: $ vmstat 1 procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 0 0 3 0 482908 7000 13084 0 0 14 15 1171 1655 0 8 91 0 0 2 0 482908 7000 13084 0 0 0 0 2259 3663 0 26 74 0 0 2 0 482900 7008 13084 0 0 0 28 2248 3602 0 21 79 0 0 2 0 482900 7008 13084 0 0 0 0 2266 3544 0 23 77 0 0 2 0 482900 7008 13084 0 0 0 0 2269 3509 0 14 86 0 0 2 0 482900 7008 13084 0 0 0 0 2296 3655 0 24 76 0 0 2 0 482900 7008 13084 0 0 0 0 2334 3579 0 19 81 0 0 2 0 482900 7008 13084 0 0 0 108 2208 3410 0 20 80 0 0 2 0 482900 7008 13084 0 0 0 0 2215 3493 0 19 81 0 0 2 0 482900 7008 13084 0 0 0 0 2273 3512 0 21 79 0 0 2 0 482900 7008 13084 0 0 0 0 2323 3620 0 23 77 0 0 2 0 482900 7008 13084 0 0 0 0 2302 3619 0 26 74 0 0 2 0 482900 7008 13084 0 0 0 0 2315 3645 0 17 83 0 0 2 0 482900 7008 13084 0 0 0 0 2322 3659 0 25 75 0 0 2 0 482900 7008 13084 0 0 0 0 2286 3570 0 17 83 0 0 2 0 482900 7008 13084 0 0 0 0 2263 3561 0 22 78 0 0 2 0 482900 7008 13084 0 0 0 0 2294 3608 0 18 82 $ cat /proc/mdstat Personalities : [raid1] read_ahead 1024 sectors md3 : active raid1 hdg3[1] hde3[0] 56894080 blocks [2/2] [UU] [==>..................] resync = 12.6% (7210432/56894080) finish=23.0min speed=35899K/sec md2 : active raid1 hdc3[1] hda3[0] 56894080 blocks [2/2] [UU] [========>............] resync = 43.0% (24489792/56894080) finish=20.6min speed=26176K/sec md0 : active raid1 hdc1[0] hda1[1] 1052160 blocks [2/2] [UU] md1 : active raid1 hdc2[0] hda2[1] 2104448 blocks [2/2] [UU] unused devices: $ cat /proc/mdstat Personalities : [raid1] read_ahead 1024 sectors md3 : active raid1 hdg3[1] hde3[0] 56894080 blocks [2/2] [UU] [=============>.......] resync = 67.2% (38241476/56894080) finish=10.6min speed=29192K/sec md2 : active raid1 hdc3[1] hda3[0] 56894080 blocks [2/2] [UU] [=================>...] resync = 86.1% (49040512/56894080) finish=5.2min speed=24700K/sec md0 : active raid1 hdc1[0] hda1[1] 1052160 blocks [2/2] [UU] md1 : active raid1 hdc2[0] hda2[1] 2104448 blocks [2/2] [UU] unused devices: Jan 7 23:13:51 se4 kernel: md: syncing RAID array md2 Jan 7 23:24:50 se4 kernel: md: syncing RAID array md3 Jan 7 23:50:05 se4 kernel: md: md2: sync done. Jan 7 23:56:47 se4 kernel: md: md3: sync done.