What does mean PDT Table?

[swdang]

Hi,
HP 9000 server K460, information of memory in MSTM shows single bit error and PDT entries used 41.
1)What does do PDT table and why does it use PDT entries?
2)How many entries count should I replace dimm?
3)Finally, what does memory single bit error? and why it happen?

Thank you...

[Bruno Vidal · Accepted solution]

Hi,
PDT means: Page Deallocation Table.
1. It is a table manage by the PDC (firmware). When a memory page has one or more error, it is deallocated, and the system is not using it anymore in order to avoid any corruption/panic.

2. There is no limit at all, you can have one entry and one day every thing will crash, and you can also have 20 entries, for ever without any problem. The reason for changing a dimm, is after an HPMC for example.

3. Memory single bit error means that the symstem has been able to correct it (because there is a parity bit), so when it occure, the page is deallocated (the good case). If you have a double bit error the system will crash (and the page will be deallocated also).

Cheers.