One of the drives in my Promise Pegasus hasn't come back after a power down.  This has happened to me before and its infuriating.  In the past I've used the command line utility to bring it back online but this time its not working:

cliib> phydrv

===============================================================================

PdId Model        Type      Capacity  Location      OpStatus  ConfigStatus     

===============================================================================

1    Hitachi HDS7 SATA HDD  1TB       Encl1 Slot1   OK        Array0 No.0      

2    Hitachi HDS7 SATA HDD  1TB       Encl1 Slot2   OK        Array0 No.1      

3    Hitachi HDS7 SATA HDD  1TB       Encl1 Slot3   OK        Array0 No.2      

 

Lost Physical Drives

===============================================================================

PdId Model              PhyCapacity Location       OpStatus   ConfigStatus     

===============================================================================

4    ATA                0Byte       Unknown        Missing    Array0 No.3      

 

cliib> phydrv -a online -p 4

 

Error (0x49841602): invalid physical drive id in data buffer

 

Any ideas what to do?