Hitachi ShadowImage for z/OS user guide (HIT9503-96004, June 2006)
78 ShadowImage for the XP1024/XP128/XP12000/XP10000
PPRC Commands with ShadowImage and TrueCopy
Both SI390 and TC390 support PPRC commands. The user must ensure that commands are being executed
by the correct program against the correct volumes. A PPRC command issued to the
XP1024/XP128/XP12000/XP10000 will be executed by SI390 against SI390 pairs if all of the following
conditions are met. If any of these conditions is not met, the PPRC command will be executed by TC390
against TC390 pairs.
1. The SI390 feature and software must be installed and enabled on the
XP1024/XP128/XP12000/XP10000.
2. The serial numbers of the S-VOL and the T-VOL must be defined according to either of the following:
a. Enter the same serial number for both S VOL and T VOL.
b. Enter an additional parameter instead of the serial number for the S VOL, and enter the serial
number for the T VOL.
For details about an additional parameter, see Table 21 on page 72 and Table 22 on page 75.
3. If the XP1024/XP128/XP12000/XP10000 contains TC390 pairs, at least one SI390 pair must exist
before the command is issued.
a. If the XP1024/XP128/XP12000/XP10000 contains both SI390 and TC390 pairs, PPRC and
PPRCOPY commands that specify the same serial number for the primary (source) and secondary
(target) volumes will be executed by SI390.
b. If the XP1024/XP128/XP12000/XP10000 does not contain any SI390 or TC390 pairs, PPRC and
PPRCOPY commands that specify the same serial number for the primary (source) and secondary
(target) volumes will be executed by SI390.
c. If the XP1024/XP128/XP12000/XP10000 contains TC390 pairs but no SI390 pairs, PPRC and
PPRCOPY commands that specify the same serial number for the primary (source) and secondary
(target) volumes will be executed by TC390.
d. If the XP1024/XP128/XP12000/XP10000 contains a M-VOL and a R-VOL of a TC390 pair but no
SI390 pairs, you must add at least one SI390 pair. You need to use XP Remote Web Console and
SI390 to create the first SI390 pair.
PSF and DEVSERV Commands
The perform subsystem function (PSF) commands key the XP1024/XP128/XP12000/XP10000 to accept
commands and requests from the user. The following table describes the operability of PSF commands on
SI390 volumes. Table 26 describes the PSF Read Subsystem Data and DEVSERV Sense Subsystem Status
results for SI390 volumes.
Table 25 PSF command operability for ShadowImage volumes
Item Operability for SI390
Device pair status. See Table 26.
Percent completion of the copy operation. Not available for SI390 because the SI390 differential bitmap
format is different from the TC390 differential bitmap format.
S-VOL with 2 or more T-VOLs. Displays information for the pair having the T-VOL with the lowest
LDEV ID.
Path status. Active.
Path number. If the volume does not also belong to a TC390 pair, 1 is displayed
with TC390 info.
Table 26 PSF and DEVSERV results for ShadowImage volumes
Pair Status PSF Read Subsystem Data DEVSERV Sense Subsystem Status
S-VOL T-VOL S-VOL T-VOL
Pending PPRI-PNDG PSEC-PNDG PPRI-PNDG PSEC-PNDG
Duplex PPRIMARY PSECONDRY PPRIMARY PSECONDRY