Link Statistics Section

There is one section per adapter.

Offsets Name Length Format Description
0 0 R748LAID 2 binary Adapter ID.
2 2 R748LTYP 1 binary Link Type:
1
ESCON®
2
Fibre Channel 1 Gbit/s
3
Fibre Channel 2 Gbit/s
4
Fibre Channel 4 Gbit/s
5
Fibre Channel 8 Gbit/s
6
Fibre Channel 16 Gbit/s
10
Ethernet Channel 10 Gbit/s
3 3 R748LFLG 1 binary Flags.
Bit
Meaning when set
0
Units of bytes indeterminable. Byte values incorrect.
1
Units of time indeterminable. Time values incorrect.
4 4   4   Reserved.
8 8 R748LERB 8 l_float ECKD™ read activity in units of 128KB.
16 10 R748LEWB 8 l_float ECKD write activity in units of 128KB.
24 18 R748LERO 8 l_float Number of ECKD read operations. For ESCON ports, one count is added per chain which transfers customer data (no administration data) to the host. For FICON® ports, one count is added per command which transfers customer data to the host.
32 20 R748LEWO 8 l_float Number of ECKD write operations. For ESCON ports, one count is added per chain which transfers customer data (no administration data) from the host. For FICON ports, one count is added per command which transfers customer data from the host.
40 28 R748LERT 8 l_float Accumulated time for ECKD read activity on the channel in milliseconds. The active processing time for each command is accumulated.
48 30 R748LEWT 8 l_float Accumulated time for ECKD write activity on the channel in milliseconds. The active processing time for each command is accumulated.
56 38 R748LPSB 8 l_float PPRC send activity in units of 128KB.
64 40 R748LPRB 8 l_float PPRC received activity in units of 128KB.
72 48 R748LPSO 8 l_float PPRC send operations. Each PPRC write command sent by the PPRC primary is counted.
80 50 R748LPRO 8 l_float PPRC received operations. Each PPRC write command received by the PPRC secondary is counted.
88 58 R748LPST 8 l_float Accumulated time for PPRC send activity in milliseconds.
96 60 R748LPRT 8 l_float Accumulated time for PPRC received activity in milliseconds.
104 68 R748LSRB 8 l_float SCSI read activity in units of 128KB.
112 70 R748LSWB 8 l_float SCSI write activity in units of 128KB.
120 78 R748LSRO 8 l_float SCSI read operations. Each read operation is counted.
128 80 R748LSWO 8 l_float SCSI write operations. Each write operation is counted.
136 88 R748LSRT 8 l_float Accumulated time for SCSI read operations on the channel in milliseconds.
144 90 R748LSWT 8 l_float Accumulated time for SCSI write operations on the channel in milliseconds.
152 98 R748LFLF 4 s_float Fibre channel link failures. Number of times the port lost meaningful communication on the link. This can cause I/O failures.
156 9C R748LFLY 4 s_float Fibre channel synchronization failures. Number of times the fibre channel signal lost synchronization.
160 A0 R748LFLS 4 s_float Fibre channel signal failures. Number of times the fibre channel signal was lost.
164 A4 R748LFPQ 4 s_float Number of fibre channel primitive sequence errors. Such errors can occur during loss of synchronization, loss of signal, or during a link failure.
168 A8 R748LFIT 4 s_float Fibre channel invalid transmission word errors. Number of bit errors, which can lead to a loss of synchronization and/or to lost fibre channel traffic.
172 AC R748LFCR 4 s_float Fibre channel Cyclic Redundancy Check (CRC) errors. Number of fibre channel frames lost due to CRC errors. This causes an I/O abort or timeout.
176 B0 R748LFR1 4 s_float Fibre channel link recovery (LR) sent. Number of times the ESS port reset the link due to a timeout on fibre channel buffer-to-buffer credit to send a frame. Such errors can cause timeouts or aborts or queued I/O frames to be lost.
180 B4 R748LFR2 4 s_float Fibre channel link recovery (LR) received. Number of times the attached port reset the link due to a timeout on fibre channel buffer-to-buffer credit to send a frame. Such errors can cause timeouts or aborts or queued I/O frames to be lost.
184 B8 R748LFIF 4 s_float Fibre channel illegal frame errors. Number of frames that violated the Fibre channel protocol. The most common cause is a missing frame. Another example is an invalid frame header. Illegal frames will cause I/O aborts or timeouts.
188 BC R748LFOD 4 s_float Fibre channel out of order data errors. Number of times that an out of order frame is detected. The most common cause is a missing frame. Such errors will cause I/O aborts or timeouts.
192 C0 R748LFOA 4 s_float Fibre channel out of order ACK errors. Number of ACK frames identified as out of order. The most common cause is a missing frame. Such errors are not expected during I/O, since I/O does not use ACK.
196 C4 R748LFDF 4 s_float Fibre channel duplicate frame errors. Number of times a duplicate frame was received. Such errors will cause I/O aborts or timeouts.
200 C8 R748LFIO 4 s_float Fibre channel invalid relative offset failures. Number of frames that were received with an invalid relative offset field in the frame header. Such errors will cause I/O aborts or timeouts.
204 CC R748LFTC 4 s_float Fibre channel sequence timeout errors. Number of times the ESS port has detected a timeout on a receiving sequence initiative for a fibre channel exchange.
208 D0 R748LFBC 4 binary Fibre channel bit error rate. A non-zero rate means that bit errors have occurred on the link within the last five minutes. This is not an accumulated error rate, but a snapshot of the last five minute interval.
Parent topic: Subtype 8 — Enterprise Disk System Statistics