Dual boot W7 and XP - XP doesn't recognise data drives

[ng17]

Hello

I have been running a desktop with XP Pro SP3 for 5 years. It has 3 HDD - one for OS/programs and two for data.

I just installed a SSD and Windows 7 Ultimate x64 onto it. I can boot OK into either OS. However, in W7 I can see all four HDD OK, whereas in XP I can only see the SSD and the HDD with XP/programs on it - I can't see the two data drives. They don't show up in XP under Windows Explorer; Computer Management; or Disk Management. Could it be something to do with changing from IDE to AHCI for the SSD install?

Thanks.

 

[ng17]

I disconnected all existing drives when I installed the SSD and W7. All four drives show up in BIOS and when I boot to W7, but the two data drives simply don't show up in XP. Could it be missing drivers? or something to do with changing the IDE setting to ACHI?

 

[ng17]

Solved this myself. It was because the mobo doesn't accept ACHI, so I deleted the Win7 partitions and re-installed it from scratch after setting teh Drives back to IDE.