RE: User space interface to controller.

Subject: RE: User space interface to controller.

From: "Tom Couch" <email@hidden>

Date: Mon, 26 Sep 2005 16:34:39 -0700

Delivered-to: email@hidden

Thread-index: AcXC3iUon8de6xKSSBWTPLztsD3lnAAEhNIw

Thread-topic: User space interface to controller.

I have an ATA RAID HBA which is managed by a driver which is a subclass of IOSCSIParallelInterfaceController.

I need to provide an interface for my user space tools to manage the RAID controller. Under Linux, FreeBSD and

Windows this is accomplished via an ioctl interface to the RAID controller driver. The largest ioctl payloads are 8K.

Tom

From: Shawn Erickson [mailto:email@hidden]
Sent: Monday, September 26, 2005 2:07 PM
To: Tom Couch
Cc: email@hidden
Subject: Re: User space interface to controller.

I am beginning to wonder exactly what you are attempting to do Tom.

Are you attempting to communicate to an controller in a storage array or to a host bus adapter in Mac?

Chris is talking about a host bus adapter which subclasses of IOSCSIParallelInterfaceController manage.

-Shawn

On Sep 26, 2005, at 1:57 PM, Tom Couch wrote:

The existing methods use 8K reads and writes.

Tom

From: Chris Sarcone [mailto:email@hidden]
Sent: Monday, September 26, 2005 1:37 PM
To: Tom Couch
Cc: email@hidden
Subject: Re: User space interface to controller.

Tom --

The interface needs to support methods that read and write large

quantities of data and provide notifications.

Can you quantify "large quantities"? Are you talking about the size of a VM page (4k) or larger?

It sounds like I need to write a user client interface. What source code do you recommend I use

as an example?

http://developer.apple.com/samplecode/SimpleUserClient/SimpleUserClient.html

-- Chris

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