ACU shows disk added as "not-supported" when it is!?!?

I have windows 2000 server with 2x 72gb SAS drives though a smart array p400 on a HP DL380 G4 carved as RAID1+0 mirror set.  I ejected and re-inserted the drive yesterday afternoon.  The Array Configuration utility showed the drive going off-line, and then started a rebuild when the drive came back on-line.  Even when the array was rebuilding, the activity LED on the physical drive was still off, when wed expect to see a lot of activity.  The thing I noted is that the second LED, a blue one, was active when the ACU was in use.  This is similar to the older 3½ drives, which light up an orange LED to show which controller or array is being configured, so at least we know that the drive is responding to a control from the ACU.  The ACU is still showing the first drive with a transfer speed of 3Gbps, while the transfer speed for the second drive is still showing as "not supported"!!!!  Im really not convinced that this is standard behaviour for a two-drive array, and I think the green LED may be off for a reason, i.e. the non-supported transfer rate.  When the drive was initially added back into the drive bay the system event log showed the logical disk as rebuilding and laterly then went to a status of ok for arry and drive as "ok".  Im still a bit concerned that although the ACU shows the array as active, we have no way of confirming this.  Ive hunted through the HP web site, and I cant find any related articles.  Please see screen shots of the array & disk attached.
The Array Diagnostics also report both drives being present and operational &..

 

Drive 1

 
Last Failure Reason: 0x00 (Drive has not failed)
Phys Drive Flags:    0x01 0x25 0xa0 0x00
                     Drive present and operational
                     S.M.A.R.T. Supported
                     S.M.A.R.T. Enabled
                     Configured as part of Logical Drive
                     Drive write cache setting is changeable and safe
 

Drive 2

 
Last Failure Reason: 0x14 (Drive removed from hot plug)
Phys Drive Flags:    0x01 0x25 0xa0 0x00
                     Drive present and operational
                     S.M.A.R.T. Supported
                     S.M.A.R.T. Enabled
                     Configured as part of Logical Drive
                     Drive write cache setting is changeable and safe

My thoughts are that the drive may be corrupted and that if we source a new replacement one it may rebuild successfully as indicated by ACU and by the appropraite LED's on the SAS disk.  But I would really appreciate if anyone had any suggestions to fix this issue without replacing the "dodgy" disk.