[O/T] raptor 10000rpm ide disks

[Samuel Flory]

Neal D. Becker wrote:
> I just got a pair of WD raptor disks, which are SATA 10000rpm.  Sweet, right?  
> No!  They are connected to Asus A7N8X MB, which has SiI3112 Serial ATA 
> (according to dmesg).
> 
> hdparm -t shows TERRIBLE slow results.  
> /sbin/hdparm /dev/hde
> 
> /dev/hde:
>  multcount    = 16 (on)
>  IO_support   =  0 (default 16-bit)
>  unmaskirq    =  0 (off)
>  using_dma    =  0 (off)
>  keepsettings =  0 (off)
>  readonly     =  0 (off)
>  readahead    =  8 (on)
>  geometry     = 4500/255/63, sectors = 72303840, start = 0
> 
> OK, now try with DMA turned on.  Locks up machine.  Here's what was logged:
> 
> Nov  4 11:30:56 rpppc1 kernel: blk: queue c03c61e8, I/O limit 4095Mb (mask 
> 0xffffffff)
> Nov  4 11:31:01 rpppc1 kernel: hde: dma_intr: status=0x51 { DriveReady 
> SeekComplete Error }
> Nov  4 11:31:01 rpppc1 kernel: hde: dma_intr: error=0x10 { SectorIdNotFound }, 
> LBAsect=1099511642367, high=65536, low=14591, sector=0
> Nov  4 11:31:21 rpppc1 kernel: hde: dma_timer_expiry: dma status == 0x21
> 
> This is with kernel 2.4.20-20.9.


    It's not the Raptor drives that are at fault.  I get >60 with hdparm 
-t.  Your kernel doesn't do dma on the sata controller which will give 
you roughly a factor of 10 slower.  Try a newer 2.4 kernel, the libata 
patches, or 2.6.


-- 
Once you have their hardware. Never give it back.
(The First Rule of Hardware Acquisition)
Sam Flory  <sflory at rackable.com>