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 disk space usage stats - last hurdle
I've been going thru the chain of disk commands trying
to see the link/relationship between them -

I have thus far:

LSPV  hdisk0
    has 70 used PPs and volgroup = rootvg

LSVG -l rootvg
    totaling up the LPs listed equals the 70 from above - ok, or coincidence
?
    HD3 has 5 LPs and 10 PPs - (mirrored disk)

LSLV hd3
    PPsize=8meg  PPs is 10 and LPs is 5  mounted on /TMP
        again, matching numbers from LSVG above - ok ? -
        what else should I notice ?

this is where I loose it -
I can't make the connection between the numbers above,
and the actual space stats from a DF
or from a DU at the /TMP node
as shown below ??

DF
    HD3 has 81,920 blks   69,584 free  (16% used)  with 1,724 iNodes (2%
used)

DU of the /TMP node
    yields 9,008 blks -

Phil -



 Sat, 08 Sep 2001 03:00:00 GMT   
 disk space usage stats - last hurdle
this is fairly straight forward

PP = Physical partition
LP= logical partition

a mirrored disk does, as you notice, occupy twice as much disk space as
logical space.

so if hd3 has 5 logical patrons of 8MB that would be 40 MB

40 x 2048 = 81920

(2048 = the number of 512 byte blocks in a megabyte)

If you crave the low down, recommended reading can be found at
www.redbooks.ibm.com

search for publication  GG24-4484 (if you have a nifty printer then its
yours for free, other wise you'll have to read on-line... or shell out
the bux and buy it)

Its quite old but for a large part, still valid.

Phil Schuman - OLX wrote:



 Sat, 08 Sep 2001 03:00:00 GMT   
 disk space usage stats - last hurdle
tnx for the followup messages -
didn't know where, or how many 1024's to plug in :)
for what the PPs were calling a megabyte -

last part - how to reconcile the DU and DF numbers ?

Phil -

In article <36F85D85.4A986...@globalvision.net>, f...@globalvision.net says...



 Sun, 09 Sep 2001 03:00:00 GMT   
 
   [ 3 post ] 

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