On Fri, 2008-01-25 at 22:28 +0100, Halim Issa wrote: > Thank you so much for the quick reply - I risk asking one follow-up question. > > On Friday 25 January 2008 22:15:20 James Bottomley wrote: > > The "cache" hear would be referring to the RAID controller cache, not > > the disk cache. Likewise DPO and FUA refer to what the RAID controller > > can support, not the disk. > > Would it be safe to assume that the problem thus lies within the mptfusion > driver, since a) the LSI Logic controller in question does indeed have > hardware cache capabilities; and b) an older kernel version as well as > Windows Server, correctly loads with the correct cache parameters at boot? I don't think it would be correct to assume that there actually is a problem. Most RAID controllers habitually lie about having a cache in their INQUIRY strings because they don't want to deal with the kernel sending SYNCHRONIZE_CACHE commands down. Just because the inquiry strings say it doesn't have a cache doesn't really mean it's not using one but not telling anyone. James - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
