Re: Drive fails & raid6 array is not self rebuild .

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	Hello Neil ,
On Thu, 8 Sep 2005, Mr. James W. Laferriere wrote:
On Fri, 9 Sep 2005, Neil Brown wrote:
On Thursday September 8, babydr@xxxxxxxxxxxxxxxx wrote:
 	When I try to do the remove I get .
root@devel-0:/ # mdadm /dev/md_d0 --remove /dev/sdao
mdadm: hot remove failed for /dev/sdao: Device or resource busy

 	I should also have 3 other drives that are spares .  I could
 	try hot remove on one of them .  See at bottom the output of
 	mdadm --misc -Q --detail /dev/md_d0
 	Which is showing no spare drives ?  And I built it with 4
 	spares

Yes... /dev/sda[pqrs] are missing.  I wonder why..

What does
  mdadm -E /dev/sda[pqrs]
show?
	See way below .

What happens if you then
 mdadm /dev/md_d0 -a /dev/sda[pqrs]
??

	Getting stranger & stranger .

root@devel-0:~ # mdadm /dev/md_d0 -a /dev/sda[pqrs]
mdadm: re-added /dev/sdap

	Is there any debugging ouptions I can enable from the
	boot: prompt or compile in ?

	just some more info ...  Hth ,  JimL

# dmesg | tail -n 43
RAID5 conf printout:
 --- rd:36 wd:35 fd:1
 disk 0, o:1, dev:sdc
 disk 1, o:1, dev:sdd
 disk 3, o:1, dev:sdf
 disk 4, o:1, dev:sdg
 disk 5, o:1, dev:sdh
 disk 6, o:1, dev:sdi
 disk 7, o:1, dev:sdj
 disk 8, o:1, dev:sdk
 disk 9, o:1, dev:sdl
 disk 10, o:1, dev:sdn
 disk 11, o:1, dev:sdo
 disk 12, o:1, dev:sdp
 disk 13, o:1, dev:sdq
 disk 14, o:1, dev:sdr
 disk 15, o:1, dev:sds
 disk 16, o:1, dev:sdt
 disk 17, o:1, dev:sdu
 disk 18, o:1, dev:sdv
 disk 19, o:1, dev:sdw
 disk 20, o:1, dev:sdy
 disk 21, o:1, dev:sdz
 disk 22, o:1, dev:sdaa
 disk 23, o:1, dev:sdab
 disk 24, o:1, dev:sdac
 disk 25, o:1, dev:sdad
 disk 26, o:1, dev:sdae
 disk 27, o:1, dev:sdaf
 disk 28, o:1, dev:sdag
 disk 29, o:1, dev:sdah
 disk 30, o:1, dev:sdaj
 disk 31, o:1, dev:sdak
 disk 32, o:1, dev:sdal
 disk 33, o:1, dev:sdam
 disk 34, o:1, dev:sdan
 disk 35, o:1, dev:sdao
md: cannot remove active disk sdao from md_d0 ...
md: cannot remove active disk sdao from md_d0 ...
md: bind<sdap>
md: bind<sdaq>
md: bind<sdar>
md: bind<sdas>

--
+------------------------------------------------------------------+
| James   W.   Laferriere | System    Techniques | Give me VMS     |
| Network        Engineer | 3542 Broken Yoke Dr. |  Give me Linux  |
| babydr@xxxxxxxxxxxxxxxx | Billings , MT. 59105 |   only  on  AXP |
+------------------------------------------------------------------+
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