Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On 06/10/2013 02:17 PM, Sebastian Riemer wrote: >> (BTW: The 3ware/LSI raid controllers perform incredibly bad when used with >> fast SSDs due to this ridiculously low max_hw_sectors_kb - it seems they >> try to promote their overpriced "SSD support" add-on-dongle that way. I can >> only say that I'll never buy a 3ware/LSI controller again, because of that.) > > Btw: You can change that on LSI MegaRAID controllers. My dear friends > from Thomas-Krenn.AG have written it into their wiki: > > http://www.thomas-krenn.com/de/wiki/Max-hw-sectors-kb_bei_LSI_Controllern_anpassen Thanks for the link, but... > The driver megaraid_sas has a module parameter "max_sectors". ... the driver "3w-sas" that drives the 3ware/LSI 9750 controller does not have such an option, and if I interpret the comments in that driver correctly, this is due to a hardware (buffer) limitation. LSI MegaRAID controllers don't seem to support JBOD (anymore), which would be reason enough for me to not buy them. Regards, Lutz Vieweg