Re: Getting the bus/adapter transfer size/rate

"S. Heck"
Good question. I installed WS2K3 on a IBM xSeries 226 so it is highly
possible I don't have the latest - greatest drivers. Will have to check
into
that.

BTW is 128KB the max single transfer length for ATA and SATA? As I
mentioned I am trying to make a ~ 2.4 MB SPTI data transfer but I highly
suspect this is not possible on any interface (SCSI, FC, USB, IEEE-1394).

Thanks!

"bill" wrote:

"S. Heck"
I ran into the following with a SATA tape drive on Windows Server 2003.

IOCTL_STORAGE_QUERY_PROPERTY

Adapter Properties
------------------
Bus Type : ATA
Maximum Transfer Length: 0x20000
Maximum Physical Pages: 0xffffffff (?????)
Alignment Mask : 0x1

IOCTL_SCSI_GET_CAPABILITIES

Maximum Transfer Length: 0x20000
Maximum Physical Pages: 0x20 (?????)
Alignment Mask : 0x1

Is this expected behavior?

Also is it possible to increase Maximum Transfer Size and Physical
Pages
to
make ~ 2.4 MB SPTI data transfers? If not is there any other interface
that
this possible?

"bill" wrote:

Ref: thread of March 23, 2007, subject "Great Then 64KB SPTI Data
Transfers?"

For several device types it's vital to know the transfer length/rate
for
the
bus/adapter they are attached to. What method does Windows provide
to programmers to get this information ?

I know about ...
IOCTL_STORAGE_QUERY_PROPERTY /
STORAGE_ADAPTER_DESCRIPTOR /
MaximumTransferLength for PnP and
IOCTL_SCSI_GET_CAPABILITIES /
IO_SCSI_CAPABILITIES /
MaximumTransferLength for older non-PnP devices.

But these don't work for the current crop of SATA & PATA devices.
What about other bus/adapter types like firewire & usb ?

Do we need to use WMI ... which seems like a lot of work to get such
basic info ?

Thanks,

BillM


Can we assume the correct SATA driver(s) have been installed ?
And the system motherboard/bios/bus etc. is fast enoungh to take
advantage of the increased through-put ?

BillM


Bus Type : ATA
Unless your mobo has SATA controller/ports, your SATA device
should be connected to a PCI/SATA adapter card. Otherwise it
will not do very well or may not work at all.

I see Serial ATA 2-Port SATA PCI Controller Card Adapters with
transfer rate of 1.5Gb/s (1500Mb/s) selling on the net for $20 USD.
The ports work for most SATA devices (hard drives, DVD drives)
but check 1st that it works for a tape drive.

BillM




.

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