Invalid tracks
Invalid tracks are tracks that are not synchronized, that is, they are tracks that are
“owed” between the two devices in an SRDF pair.
R11 devices
R11 devices operate as the R1 device for two R2 devices. Links to both R2 devices are
active.
R11 devices are typically used in SRDF/Concurrent solutions where data on the R11
site is mirrored to two secondary (R2) arrays.
The following image shows an R11 device in an SRDF/Concurrent Star solution.
Figure 26 R11 device in concurrent SRDF
Site
A
Source
Site
B
Target
Site
C
Target
R11
R2
R2
R21 devices
R21 devices operate as:
l
R2 devices to hosts connected to array containing the R1 device, and
l
R1 device to hosts connected to the array containing the R2 device.
R21 devices are typically used in cascaded 3-site solutions where:
l
Data on the R1 site is synchronously mirrored to a secondary (R21) site, and then
l
Synchronously mirrored from the secondary (R21) site to a tertiary (R2) site:
Remote replication solutions
118
Product Guide
VMAX 100K, VMAX 200K, VMAX 400K with HYPERMAX OS
Summary of Contents for VMAX 100K
Page 1: ...EMC VMAX3 Family Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS REVISION 6 5 ...
Page 20: ...Preface 20 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Page 46: ...VMAX3 with HYPERMAX OS 46 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Page 72: ...Open systems features 72 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Page 82: ...Provisioning 82 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Page 158: ...Remote replication solutions 158 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Page 186: ...Mainframe Error Reporting 186 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Page 200: ...Licensing 200 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...