Here is a situation that has caught my eye...
I have a 2.2.5-22 Kernel with RAID1 compiled in, I am not attempting to have
a RAID1 root file system and
cat /proc/mdstat is:
Personalities : [raid1]
read_ahead 1024 sectors
md0 : active raid1 sdb5[1] sda5[0] 6144704 blocks [2/2] [UU]
md1 : active raid1 sdb6[1] sda6[0] 1333248 blocks [2/2] [UU]
md2 : active raid1 sdb7[1] sda7[0] 513984 blocks [2/2] [UU]
md3 : active raid1 sdb8[1] sda8[0] 513984 blocks [2/2] [UU]
md4 : active raid1 sdb10[1] sda10[0] 104320 blocks [2/2] [UU]
unused devices: <none>
========================
This is what I expected.
Now when I look at
cat /proc/scsi/aic7xxx/0:
Adaptec AIC7xxx driver version: 5.1.16/3.2.4
Compile Options:
TCQ Enabled By Default : Disabled
AIC7XXX_PROC_STATS : Enabled
AIC7XXX_RESET_DELAY : 5
Adapter Configuration:
SCSI Adapter: Adaptec AHA-294X Ultra2 SCSI host adapter
Ultra-2 LVD/SE Wide Controller
PCI MMAPed I/O Base: 0xe8000000
Adapter SEEPROM Config: SEEPROM found and used.
Adaptec SCSI BIOS: Enabled
IRQ: 11
SCBs: Active 0, Max Active 2,
Allocated 15, HW 32, Page 255
Interrupts: 183757
BIOS Control Word: 0x18a6
Adapter Control Word: 0x1c5d
Extended Translation: Enabled
Disconnect Enable Flags: 0xffff
Ultra Enable Flags: 0x0000
Tag Queue Enable Flags: 0x0000
Ordered Queue Tag Flags: 0x0000
Default Tag Queue Depth: 8
Tagged Queue By Device array for aic7xxx host instance 0:
{255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255}
Actual queue depth per device for aic7xxx host instance 0:
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
Statistics:
(scsi0:0:1:0)
Device using Wide/Sync transfers at 80.0 MByte/sec, offset 15
Transinfo settings: current(10/15/1/0), goal(10/15/1/0), user(10/127/1/0)
Total transfers 175061 (87910 reads and 87151 writes)
< 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+
Reads: 1 67724 4327 6698 5453 961 1442 1304
Writes: 0 66694 14041 2113 740 389 396 2778
(scsi0:0:2:0)
Device using Wide/Sync transfers at 80.0 MByte/sec, offset 15
Transinfo settings: current(10/15/1/0), goal(10/15/1/0), user(10/127/1/0)
Total transfers 2163 (2157 reads and 6 writes)
< 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+
Reads: 1 7 0 16 0 0 0 2133
Writes: 0 0 0 6 0 0 0 0
(scsi0:0:3:0)
Device using Narrow/Sync transfers at 10.0 MByte/sec, offset 32
Transinfo settings: current(25/32/0/0), goal(10/127/1/0), user(10/127/1/0)
Total transfers 6146 (0 reads and 6146 writes)
< 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+
Reads: 0 0 0 0 0 0 0 0
Writes: 0 0 0 0 6146 0 0 0
====================
I am concerned with the Statistics section from above. The last device
scsi0:3:0 is a tape drive so no problem there. However, if I am reading
this correctly, the scsi0:1:0 is my sda device and scsi0:2:0 is my sdb
device. If RAID1 is working correctly wouldn't the Total transfers count be
going up for both scsi0:1:0 and scsi0:2:0 at the same time? When I write to
the file-systems I can see the counters increase for scsi0:1:0 but not for
scsi0:2:0.
Am I supposed to change my /etc/fstab to reflect the new /dev/md devices
instead of the /dev/sda devices? When I boot the RAID1 is auto-detected
just fine, so I have made the assumption that RAID1 was working.
Any ideas?
Aaron Bush
[EMAIL PROTECTED]
