This is really wierd problem with mdadm.
I currently have 8 Maxtor 200gb disks.
They are connected like this
hdb hdc hdd = onboard ide
hde hdf hdg hdh = Promise ata133 card
hdk = Promise ata 133 card.
Hardware is a P4 2.8ghz with 2gb of ram and a MSI NEO 2 mobo.
Problem is that te resync is really slow and when it's done it just loops
and the box craches.
Here are some info.
Currently i'm testing a resync with a non HT/SMP config and noapic just to
check that is no irq routing crap. (failed before though)
merlin / # uname -a
Linux merlin 2.6.10-gentoo-r6 #16 Thu Feb 17 11:00:11 CET 2005 i686 Intel(R)
Pentium(R) 4 CPU 2.80GHz GenuineIntel GNU/Linux
merlin / # cat /proc/interrupts
CPU0
0: 6621371 XT-PIC timer
1: 8 XT-PIC i8042
2: 0 XT-PIC cascade
3: 1487791 XT-PIC eth1
10: 1628242 XT-PIC eth0, eth2
11: 112644 XT-PIC ide2, ide3
12: 35197 XT-PIC ide5
14: 71092 XT-PIC ide0
15: 63376 XT-PIC ide1
NMI: 0
ERR: 40328
cat /proc/mdstat
Personalities : [raid5]
md0 : active raid5 hde1[0] hdb1[8] hdd1[7] hdk1[6] hdc1[4] hdh1[3] hdg1[2]
hdf1[1]
1393991424 blocks level 5, 64k chunk, algorithm 2 [8/7] [UUUUU_UU]
[=>...................] recovery = 5.5% (11110168/199141632)
finish=1641.7min speed=1906K/sec
unused devices: <none>
(The resync speed is always somewhere between 500K to 3000K/s) should be
10000K/s ;-)
This is the kernelog. it's just a lil grab in it since this list goes on
untill i reboot the box. (its freezed).
This is what i get when sync is finiched and it should markt the array good.
Feb 17 07:17:08 [kernel] md: using maximum available idle IO bandwith (but
not more than 150000 KB/sec) for reconstruction.
Feb 17 07:17:08 [kernel] md: md0: sync done.
Feb 17 07:17:08 [kernel] .<6>md: syncing RAID array md0
Feb 17 07:17:08 [kernel] md: md0: sync done.
Feb 17 07:17:08 [kernel] .<6>md: syncing RAID array md0
Feb 17 07:17:08 [kernel] md: md0: sync done.
Feb 17 07:17:08 [kernel] .<6>md: syncing RAID array md0
Feb 17 07:17:08 [kernel] md: md0: sync done.
Feb 17 07:17:08 [kernel] .<6>md: syncing RAID array md0
Feb 17 07:17:08 [kernel] md: md0: sync done.
Feb 17 07:17:08 [kernel] .<6>md: syncing RAID array md0
Feb 17 07:17:08 [kernel] md: md0: sync done.
Feb 17 07:17:08 [kernel] .<6>md: syncing RAID array md0
Feb 17 07:17:08 [kernel] md: md0: sync done.
Feb 17 07:17:08 [kernel] .<6>md: syncing RAID array md0
Feb 17 07:17:08 [kernel] md: md0: sync done.
Feb 17 07:17:08 [kernel] .<6>md: syncing RAID array md0
Feb 17 07:17:08 [kernel] md: using maximum available idle IO bandwith (but
not more than 150000 KB/sec) for reconstruction.
Feb 17 07:17:08 [kernel] .<6>md: syncing RAID array md0
Feb 17 07:17:08 [kernel] md: md0: sync done.
Feb 17 07:17:08 [kernel] .<6>md: syncing RAID array md0
I've also tried to have 4 disks on each promise card with same result. (if
having apic i get alot of cpu apic error 60)
i have checked all disks with smarttool and also benchmarked them. Each disk
gets about (hdparm) -T = 1800mb/s and -t 60mb/s so i doubt that
theres actually a broken disk.
i'm running mdadm 1.7.0
This is toally bugging me out.
Help is really really apricated.
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