TARGA SYSTEMS
S3 SATA Installation Guide
32003375 Rev 2
5
3.0
SATA
Operations
The DTU performance and interaction with the "Host" computer is dependent on the Operating
System (OS) selected and the degree to which the OS supports "removable" media.
3.1
General Operations Considerations
Please review the following conditions in order to determine the target systems level of support
and to ensure the response is appropriate for the application.
Media format
The target systems (ie Mission System and Ground Support) MUST
support the same PC Card "file" format. Normally this is the "DOS" file
format
Removable Media
Does the target system (OS) support the concepts of "removable" media.
Media not present
If the PC Card is not present at power-up, how does the target system
respond at both power up and when the PC card eventually is inserted.
Media Removal
Before opening the door to remove the PC Card does the target
(Door Open)
system allow the user to indicate the media is about to be removed to
avoid disk file format corruption and or lost file data.
Media change
If a PC Card is replaced, does the target OS detect the
(Door open/close)
"media" change and respond accordingly.
3.1.1
Targa SATA Holder - General Operation Overview
Media Format
Targa's DTU is a block oriented I/O device and has no explicit
knowledge or support of any file structure. It reads or writes at a
specified block or sector number
Media Not Present
If the door is closed, but the PC Card is not present the Targa's SATA
interface uses ‘out of bounds’ (OOB) signalling to indicate the SATA
link has been disconnected.
Door Open
When the door is opened, power is removed from the PC Card and the SATA
interface uses ‘out of bounds’ (OOB) signalling to indicate the SATA
link has been disconnected.
Door Close
When the door is closed and a PC Card is installed the SATA interface is
re-enabled and power applied to the PC Card. At this time the host
system should detect a change in state of the SATA OOB signalling and
re-initialize the SATA link – Note: only if this feature is supported by
the host system SATA controller and OS BIOS.
If not supported the PC Card must be installed and the access door
closed when the host system is started.
Card Removal
Note: If write caching is enabled on the host system, you must wait
approximately 30-60 seconds after any write to the PC Card before it is
removed, to permit the cached write data to be sent to the PC Card.
