Thread: Ubuntu server and SAN problems

hi people

have san(storage area network) solution ibm
- 2 blades chasis
- 1 extern storage 4.9 tb (raid 5)
- each blade have 146gb (raid 1)

when installation began how recognize devices

code:

  scsi1 (0,0,0) (sda) - 5.0 tb ibm 1726-4xx fastt  	pri/log	   5.0 tb free space  scsi2 (0,0,0) (sdb) - 5.0 tb ibm 1726-4xx fastt    scsi4 (1,1,0) (sdc) - 146.0 gb lsilogic logical volume  	pri/log	   146.0 gb free space

scsi1 , scsi2 same because have 2 fiber channel high avaibility (2 fiber channel each chasis storage)

finish installation
, in boot time

code:

_grub_  error 21: selected disk not exist

so, change root (hd1,0) root (hd0,0) , start boot. have errors this

code:

*loading hardware drivers ...  buffer i/o error on device sdc, logical block 0  buffer i/o error on device sdc, logical block 0   buffer i/o error on device sdc, logical block 0   ldm_validate_partition_table(): disk read failed  buffer i/o error on device sdc, logical block 0  buffer i/o error on device sdc, logical block 3  buffer i/o error on device sdc, logical block 2  ...

after install multipath-tools, mdamd, kpartx

code:

$ sudo multipath -d  sdc: checker msg  "directio checker reports path down"  create 360050.......20d lsilogic, logical volume  [size=136g][features=0][hwhandler=0]  \_ round-robin 0 [prio=1][undef]   \_ 0:1:1:0 sda 8:0 [undef][ready]

well after try reinstall , in partition table

code:

scsi1 (0,0,0) (sda) - 5.0 tb ibm 1726-4xx fastt  	#5 logical       600.3 gb 	ext3  		pri/log	   4.4 tb	free space  scsi2 (0,0,0) (sdb) - 5.0 tb ibm 1726-4xx fastt  scsi4 (1,1,0) (sdc) - 146.0 gb lsilogic logical volume  	#1 primary	140.0 gb b ext3  	#5 logical	  6.0 gb f swap  swap

first problem
happen?! installation take 600 gb instead 5tb. don't understand why?

second problem
need howto configuration of multipath don't found @ google

hope guys can helpme

p.d.:sorry english bad.

if that's think have san controller lsi rdac , have use handler (rdac) can not tell how set during installation, read around how i've yet try (next week!) say, in meantime please follow link:

http://blog.loftninjas.org/2008/06/1...path-checking/

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