SAS 6/iR read write performance

L.P.H. van Belle belle at
Mon Jun 2 07:40:15 CDT 2008

I tried kernels 2.6.18 ( debian tree ) default ok for sas, but no tg3 driver

kernel 2.6.24 debian testing 
2.6.25 debian unstable
klik on C after the git kernel 
in search mptsas. 
and there is more to find there about this ussue


Van: Dominique LALOT [mailto:dom.lalot at] 
Verzonden: maandag 2 juni 2008 14:21
Aan: L.P.H. van Belle
Onderwerp: Re: SAS 6/iR read write performance

L.P.H. van Belle a écrit : 

I installed debian etch on a R300 with the ch from kmuto.
hdparm test ( hdparm -tT /dev/sda ) 
resultes in 1700MB/s cached
buffert 4 MB/s !!!! 
If i put load on the storage i get errors, when i give lots of load
the server stops working, aka my file system goes to read only.
These bugs are related to old drivers and new firmware.
info found on, search for mptsas.

can you give me the right url to see if it looks like ours

fixes are found in 2.6.26-rc4-git

I don't know how to get it and test it

I haved tried these yet, but these bugs look like mine.

not sure. We have been unlucky with the very last kernels. In the iso, there
was no  support for our  ethernet  device. So  we didn't  try enough.
Anyway, the problem appears in 2.6.22


my advies : 
DONT USE SAS6i/R ( or SAS6i/R ) , and buy a PERC 5/6 
I spend about 10 hours trying to get this to work, so i think its cheaper
to buy a PERC 6. these work out of the box.



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