- 论坛徽章:
- 0
|
HP-UX 10.x includes Memory Page Deallocation (MPD), a memory fault tolerance feature that allows memory boards to continue to function after a failure. MPD deallocates 4-KB pages and keeps track of them in the Page Deallocation Table (PDT). The PDT is maintained by PDC and contains entries for DBEs (double bit errors), hard SBEs (single bit errors that are reproducible, or two occurrences of the same SBE within a certain time period), the Golden Memory size (a segment of DBE-free memory for the kernel to reside in ), the IS (interleave status) bit, and the CS (PDT clear status) bit. The table is stored in non-volatile RAM, so the contents are preserved between system boots.
The kernel and diagnostics support online deallocation of bad pages on both Series 700 and Series 800 systems. However, because the PDT requires firmware (PDC) support, only the following systems can deallocate the same bad pages between system boots: Series 800 Model T-500, Series 800 Model 890, and Series 800 Model K on future releases of 10.x. |
|
免费注册
发表于 2009-02-23 11:02
