User's Manual

Debugging performance issues 11
Send the bundle to [e-mail], and request assistance in debugging a performance issue.
[Reviewers: how do HP customers handle this?]
Below is an example of a bandwidth error reported by fio-pci-check, caused by an over-subscription
condition. Any line indicated with an asterisk indicates a possible problem detected by the
fio-pci-check utility.
fio-pci-check
Root Bridge PCIe 3000 MB/sec
Bridge 00:02.00 (01-05)
*Needed 3000 MB/sec Avail 2000 MB/sec
Bridge 01:00.00 (02-04)
*Needed 3000 MB/sec Avail 2000 MB/sec
Bridge 02:00.00 (03-03)
Needed 1000 MB/sec Avail 1000 MB/sec
ioDrive 03:00.0 Firmware 14071
Handling PCIe errors
Issue
Data errors might be introduced when data is passed across the bus.
Solution
PCIe detects, and in many situations, corrects, data errors. These errors can also be detected by running the
fio-pci-check utility.
NOTE: The fio-pci-check utility is not fully functional on all operating systems.
If such errors are detected on your system:
1. Reseat all risers and IO Accelerators in the system.
2. Run some significant data to and from the IO Accelerator in question and check for errors again.
3. If the errors continue, the most common culprit is a riser card. Install a different riser card.
4. If errors persist, install a different motherboard.
5. If errors persist, install a new IO Accelerator.
The IO Accelerator causes PCI errors to show up faster than other devices do. Because of the high
performance, the IO Accelerator is demanding on the PCI Express bus, showing errors in the system that
other devices might not be able to uncover.
If multiple cards are installed in the system, use the fio-status and fio-beacon utilities to determine
which of the drives is failing. The fio-status utility returns the serial number for the device, and the
fio-beacon utility turns on the beacon LED for identification.