The STORAGE_BUS_TYPE enum in the latest WDK does not have an entry for
eSATA, is there a way to tell an eSATA drive apart from a SATA drive?
Bill M.
Bill McKenzie wrote:
The STORAGE_BUS_TYPE enum in the latest WDK does not have an entry for
eSATA, is there a way to tell an eSATA drive apart from a SATA drive?
I didn’t think there was any way to tell them apart electrically. Does
the SATA controller have any way to tell the difference?
–
Tim Roberts, xxxxx@probo.com
Providenza & Boekelheide, Inc.
I don’t have the spec, but according to Wiki:
External SATA
Standardized in mid-2004, eSATA defined separate cables, connectors, and
revised electrical requirements for external applications:
a… Minimum transmit potential increased: Range is 500-600 mV instead of
400-600 mV.
b… Minimum receive potential decreased: Range is 240-600 mV instead of
325-600 mV.
c… Identical protocol and logical signaling (link/transport-layer and
above), allowing native SATA devices to be deployed in external enclosures
with minimal modification
d… Maximum cable length of 2 m
I would assume the controller would have to know the difference?
Bill M.
“Tim Roberts” wrote in message news:xxxxx@ntdev…
> Bill McKenzie wrote:
>> The STORAGE_BUS_TYPE enum in the latest WDK does not have an entry for
>> eSATA, is there a way to tell an eSATA drive apart from a SATA drive?
>>
>
> I didn’t think there was any way to tell them apart electrically. Does
> the SATA controller have any way to tell the difference?
>
> –
> Tim Roberts, xxxxx@probo.com
> Providenza & Boekelheide, Inc.
>
>
A SATA controller *may* have a way of telling them apart, but it’s vendor specific. For example all of your PHY’s may be e signal capable but you don’t know which ports the customer routed to the back panel and which are with i connectors inside the box.
From: xxxxx@lists.osr.com on behalf of Bill McKenzie
Sent: Thu 7/5/2007 4:57 PM
To: Windows System Software Devs Interest List
Subject: Re:[ntdev] STORAGE_BUS_TYPE
I don’t have the spec, but according to Wiki:
External SATA
Standardized in mid-2004, eSATA defined separate cables, connectors, and
revised electrical requirements for external applications:
a… Minimum transmit potential increased: Range is 500-600 mV instead of
400-600 mV.
b… Minimum receive potential decreased: Range is 240-600 mV instead of
325-600 mV.
c… Identical protocol and logical signaling (link/transport-layer and
above), allowing native SATA devices to be deployed in external enclosures
with minimal modification
d… Maximum cable length of 2 m
I would assume the controller would have to know the difference?
Bill M.
“Tim Roberts” wrote in message news:xxxxx@ntdev…
> Bill McKenzie wrote:
>> The STORAGE_BUS_TYPE enum in the latest WDK does not have an entry for
>> eSATA, is there a way to tell an eSATA drive apart from a SATA drive?
>>
>
> I didn’t think there was any way to tell them apart electrically. Does
> the SATA controller have any way to tell the difference?
>
> –
> Tim Roberts, xxxxx@probo.com
> Providenza & Boekelheide, Inc.
>
>
—
Questions? First check the Kernel Driver FAQ at http://www.osronline.com/article.cfm?id=256
To unsubscribe, visit the List Server section of OSR Online at http://www.osronline.com/page.cfm?name=ListServer
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Re:[ntdev] STORAGE_BUS_TYPEBummer…thanks!
Bill M.
“Mark Overby” wrote in message news:xxxxx@ntdev…
A SATA controller may have a way of telling them apart, but it’s vendor specific. For example all of your PHY’s may be e signal capable but you don’t know which ports the customer routed to the back panel and which are with i connectors inside the box.
------------------------------------------------------------------------------
From: xxxxx@lists.osr.com on behalf of Bill McKenzie
Sent: Thu 7/5/2007 4:57 PM
To: Windows System Software Devs Interest List
Subject: Re:[ntdev] STORAGE_BUS_TYPE
I don’t have the spec, but according to Wiki:
External SATA
Standardized in mid-2004, eSATA defined separate cables, connectors, and
revised electrical requirements for external applications:
a… Minimum transmit potential increased: Range is 500-600 mV instead of
400-600 mV.
b… Minimum receive potential decreased: Range is 240-600 mV instead of
325-600 mV.
c… Identical protocol and logical signaling (link/transport-layer and
above), allowing native SATA devices to be deployed in external enclosures
with minimal modification
d… Maximum cable length of 2 m
I would assume the controller would have to know the difference?
Bill M.
“Tim Roberts” wrote in message news:xxxxx@ntdev…
> Bill McKenzie wrote:
>> The STORAGE_BUS_TYPE enum in the latest WDK does not have an entry for
>> eSATA, is there a way to tell an eSATA drive apart from a SATA drive?
>>
>
> I didn’t think there was any way to tell them apart electrically. Does
> the SATA controller have any way to tell the difference?
>
> –
> Tim Roberts, xxxxx@probo.com
> Providenza & Boekelheide, Inc.
>
>
—
Questions? First check the Kernel Driver FAQ at http://www.osronline.com/article.cfm?id=256
To unsubscribe, visit the List Server section of OSR Online at http://www.osronline.com/page.cfm?name=ListServer
------------------------------------------------------------------------------
This email message is for the sole use of the intended recipient(s) and may contain confidential information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message.
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