Bartlomiej Zolnierkiewicz wrote:

> Please look at write_cache(), it will try to {en,dis}able write cache
> and then set drive->wcache *only* if disk has ATA-6 cache flush bits.

Yes, you're quite right.

Have again attached a 'rollup' patch against vanilla 2.6.6, including 
this, Andrew's SYSTEM_SHUTDOWN split and the quick "don't switch of 
spindle if rebooting" hack. Again, just in case anyone finds it useful.

(by the way, the SYSTEM_SHUTDOWN split is already in -mm2)

Rene.