HP StorageWorks XP Remote Web Console Software - Manual (Page 20)

20 TrueCopy for the XP128/XP1024/XP10000/XP12000
(SCP) messages. For more information on cache usage and sidefile thresholds, see ” Inflow Control of
Recordsets ” on page 32.
Table 3 XP128/XP1024/XP10000/XP12000 modes for TrueCopy for z/OS
Mode Description
20 Enables TC390 – R-VOL read-only function (RCU only).
21 Required ON for MCUs and RCUs that connect to channel extenders.
36 TC390 Synchronous – Selects function of CRIT=Y(ALL) or CRIT=Y(PATHS).
Mode 36 ON: CRIT=Y(ALL) => equivalent to Fence Level = Data.
Mode 36 OFF: CRIT=Y(PATHS) => equivalent to Fence Level = Status.
38 TC390 – Changes SSB reported against the WRITE I/O to the M-VOL in critical state.
Mode 38 ON: Intervention required.
Mode 38 OFF: Command rejected (PPRC specification).
45 HXRC – Sleep Wait suppressing option (see modes 61, 85, 86, 97; see ” HXRC Device Blocking and
Load Balancing ” on page 201). When Mode 45 is ON and Mode 61 is ON, WRITE I/Os for LDEVs
are blocked by the threshold specified by SDM.
Mode 45 OFF: Sidefile threshold activates Sleep Wait timer at the sleep wait threshold.
Mode 45 ON: Sidefile threshold does not activate Sleep Wait timer at the sleep wait threshold.
61 HXRC – Enables the DONOTBLOCK option of the XADDPAIR command (see mode 45; see ” HXRC
Device Blocking and Load Balancing ” on page 201).
Must be OFF if the operating system does not support the DONOTBLOCK option.
Mode 61 OFF: DONOTBLOCK option ignored.
Mode 61 ON: DONOTBLOCK option activated.
64 TC390 CGROUP – Defines scope of CGROUP command within the
XP128/XP1024/XP10000/XP12000. Must be OFF for GDPS.
Mode 64 OFF: TC390 volumes behind the specified LCU pair (main and remote LCUs).
Mode 64 ON: All TC390 volumes in this XP128/XP1024/XP10000/XP12000.
85, 86 HXRC – Variable sidefile threshold (see modes 45, 97, 98; see ” HXRC Device Blocking and Load
Balancing ” on page 201).
Mode 85 ON and Mode 86 OFF: Thresholds for Sleep wait/SCP/Puncture = 30/40/50%
Modes 85 and 86 OFF: Thresholds for Sleep wait/SCP/Puncture = 40/50/60%
Mode 85 OFF and Mode 86 ON: Thresholds for Sleep wait/SCP/Puncture = 50/60/70%
Modes 85 and 86 ON: Thresholds for Sleep wait/SCP/Puncture = 60/70/80%
93 Graduated delay process for sidefile control (see ” Graduated Delay Sidefile Management” on
page 33 ):
Mode 93 OFF (default) = strong delay type
Mode 93 ON = soft delay type
Amount of sidefileStrong delay typeSoft delay type
threshold – [15-20%] (HWM)100 ms x 1 time20 ms x 1 time
threshold – [10-15%]200 ms x 1 time40 ms x 1 time
threshold – [5-10%]300 ms x 1 time60 ms x 1 time
threshold – [0-5%]400 ms x 1 time80 ms x 1 time
threshold or higher500 ms x permanent100 ms x permanent