linux kernel option to set sata disk to udma/133 1.5gbps
- by John Doe
hi,
i try to speed up boot time of my linux server box which uses
removable HDD rack's
the current boot time is around 2 min's but if i connect the hdd's directly to the mainboard
its about 2 sec's
the problem is that ahci's kernel implementation causes a timeout of around 30 seconds for each disk during boot which originates from the hdd-rack
after the timeout the kernel prints that the disk is limited with speed to 1.5gbps and udma/133 is used
so the question i have is:
how can i set this in grub as a boot option so the kernel doesnt have to wait for a timeout
and just hardcoded limits the speed of the disks? i read about a few options like pci=nomsi
or such, which dont work
thats why im asking for limiting precisely the disks during boot
thx
