![7.9 Network Statistics](/images/new-backgrounds/53721/5372149x1.webp)
DVAS Instruction Manual Bosch GUI
7.9 Network Statistics
This page provides information about the network link. If you are having problems with the network, this page may be helpful.
Figure 24 Network Statistics
Available Information:
Information | Description |
|
|
Collisions | Counter of packet collisions when two network |
| devices transmit at the same time. |
FIFO errors | Counter of DMA (Direct Memory Access) |
| transfer errors when loading the FIFO (First In |
| First Out buffer) on the Network IC. |
|
|
Carrier errors | Counter of errors from the data carrier signal |
| due to being outside the limits or lost during |
| transfer. |
|
|
Window errors | Counter of times the Network IC runs out of |
| FIFO space. |
|
|
Overflow errors | Counter of times the Network IC runs out of |
| FIFO space. |
Length errors | Counter of packets less than 64bytes or greater |
| than 1518bytes. |
|
|
CRC errors | Counter of packets with bad CRC (cyclic |
| redundancy check); count increases when a |
| packet containing corrupt data is received. |
|
|
Frame errors | Counter of frame alignment errors caused by a |
| frame without the correct number of bytes, but |
| still within the length limit. |
|
|
EN 25
7.10 Bad Blocks
Bad blocks are sections of the disk that data can no longer be read from or written to. A DVAS array automatically remaps single bad blocks to a spare blocks portion of the disk when using a parity- protected RAID level. However, if two bad blocks are discovered at once, that block of data is lost. This is most likely to happen during a rebuild, or when one disk is missing and another disk has a media error. In general, bad blocks are unlikely to occur.
This page shows the number of bad blocks for each drive. If there are bad blocks present, their location can be viewed by clicking Details (in the
Figure 25 Bad Blocks
Bosch Security Systems 20 January 2004