problem with sed inside sed

i am trying to parse a string inside a sed command but i am getting errors. if some1 can help me... it would be nice. i dunno what else to try

sed -e "/pd begin $(echo 3:1I:1:1|sed 0,/:/{s/:/' '/})",/pd end $(echo 3:1I:1:1|sed 0,/:/{s/:/' '/})/p /tmp/hp-raid-data-harvester.out

i need to replace the first ':' from the string "3:1I:1:1". it has to be in one line and cant be changed before. The string is comming form the database with string $1

file hp-raid-data has inside those lines

### pd begin 3 2I:1:1 ###

Smart Array P410 in Slot 0

   array B

      physicaldrive 2I:1:1
         Port: 2I
         Box: 1
         Bay: 4
         Status: OK
         Drive Type: Data Drive
         Interface Type: SATA
         Size: 3 TB
         Rotational Speed: 7200
         Firmware Revision: CC4H
         Serial Number:             Z1F21GLG
         Model: ATA     ST3000DM001-9YN1
         SATA NCQ Capable: True
         SATA NCQ Enabled: True
         Current Temperature (C): 33
         Maximum Temperature (C): 42
         PHY Count: 1
         PHY Transfer Rate: 3.0Gbps


### pd end 3 2I:1:1 ###

sorry for bad english but i am writting in a hurry