I have a intel SE7505vb2 motherboard with the SiI3112 sata controller, 2x160 Gb hd in raid 0. The operating system is redhat 7.3 with 2.4.18-3smp kernel.
To install the driver I have readed the installation instructions in the zip file that I downloaded from the SiliconImage site. I had installed RH without problem-->linux saw a
one disk with 320 Gb capacity. After installation the system see a different controller, the SiI6512 instead of SiI3112. Following the output of
cat /proc/scsi/SiI6512/*:

Driver for SiI 3112 to 6512 SATA RAID Controllers
Rev: 1.0.0.16, Date: Jul 18 2003 Time: 12:04:21
Memory (unique_id) at 0xD2221000, Irq 19
(Ri) Device(s) attached:
0: Maxtor 6Y160M0 ( UDMA6 )
1: not attached
2: Maxtor 6Y160M0 ( UDMA6 )
3: not attached


Raid Information

and cat /proc/scsi/scsi:

Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: SiI Model: RAID 0 Set 0 Rev: 1100
Type: Direct-Access

I have a doubt if the system is correctly configured, because if I use the hdparm -tT /dev/sda6 teh transfer rate is
/dev/sda6:
Timing buffer-cache reads: 128 MB in 0.27 seconds =474.07 MB/sec
Timing buffered disk reads: 64 MB in 0.60 seconds =106.67 MB/sec

The second doubt is that I haven't the raidtab file in /etc
And, the most important, why when I want to halt the system it stops at this point : "SII680_shutdown: setting adapter 0 Raidtype = 0<0> Power down".
Thanks in advance.

Everything looks fine.

/etc/raidtab is needed only when you use the linux's own software raid. In this case you are using silicon image's raid controller (which, I think, is also a software raid, but has bios support for it).

You think the speeds are too high? The raid driver is caching in between so those numbers doesn't really mean a thing.

And the power down -thing. It is the last words linux kernel say when shutting down. If apm support is enabled, it also sends power-off signal to it; if not, it halts there.

Thanks for the answers. I think that the speeds are too low for this type of disk....or not?
For the apm support, I see in the Service configuration the apmd is enable.
bye

According to my understanding, 50 MB/s is really fast hd access with modern ide disks.
Quick googling with the lucky button for "sata hard disk speeds" gives a number 150 MB/s, having over 3 times more (the 474MB/s) is quite high.