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sar + sdXY,Z + /dev/dsk


 
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# 1  
Old 09-05-2003
sar + sdXY,Z + /dev/dsk

Hello!

When I use "sar -d" I get information about disk activities like:

sd0 ...
sd0,a ...
sd0,b ...
.....
sd22 ...
sd22,a ...
.....

How I can find by , for example sd22,a , what physical disk is it. For example /dev/dsk/c1t3d0s1 easy to read and I can find by it physical disk. But I can't find how I can interpret
sdXY,Z
sd - scsi disk, but what mean XY and Z in this.

Thanks for any links or explanation.
# 2  
Old 09-05-2003
How about a few clues here? What release of what os running on what hardware?
# 3  
Old 09-05-2003
O, really sorry, of course.
Sun Solaris 8
all disks are SCSI, in external multipack (except system's)
# 4  
Old 09-05-2003
With Sun, sd0 is a disk and sd0,a is a slice on that disk. The file /etc/path_to_inst will tell the hardware path of sd0:
grep ' 0 "sd"' /etc/path_to_inst

On one of my systems I get,
"/sbus@1f,0/SUNW,fas@e,8800000/sd@0,0" 0 "sd"

To find the special files that refer to that disk, just do a "ls -l" and grep for that string:
ls -l /dev/dsk/* | grep "/sbus@1f,0/SUNW,fas@e,8800000/sd@0,0"

However, I think that you should consider iostat rather than sar. iostat -x will give you better stats than sar. iostat -xp will make that a line of stats for each slice. And iostat -xpn will rename the lines with the special file names, thus saving you from this whole exercize.
# 5  
Old 09-08-2003
Really thanks.
It's helped.
 

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