G06.25 Software Installation and Upgrade Guide

Overview of Installing G06.25
G06.25 Software Installation and Upgrade Guide—529430-001
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Installing an IOAM Enclosure and Other
Components
•
Both Tetra-8 and Tetra-16 are supported for IOAM installation.
Certain limitations exist for configurations that include ESS or IOAM enclosures. For a
comprehensive list of these limitations, contact your HP representative. Some
limitations are:
•
Only ESS-trained technicians can handle or configure ESS equipment. For
activities that involve installing, configuring, or operating the ESS, the technician
trained for working with the ESS must be on site and available.
•
You must isolate SWAN adapters on your system before you install an IOAM
enclosure. For more information, contact your service provider.
Migrating Existing Data to ESS
The migration of existing data from internal SCSI-attached, 514-byte sector disks to
industry standard, 512-byte sector disk subsystems includes an improved method for
checksum protection. The new checksum protection method employed for unstructured
files requires the data stored on disk be contiguous and aligned in units of 28 KB.
When a non-partitioned unstructured file is created or migrated to ESS, the extent
sizes are rounded up to a mod-14 boundary, since an extent page is 2 KB. This
ensures continuity of the data set protected by the checksum. This design ensures the
best possible performance for unstructured files, without adding significant overhead
for checksums. Each 28 KB of data is protected with a 4-KB check block, which
contains the checksum information.
Partitioned unstructured files cannot be migrated to an ESS without first performing a
migration of all partitions of the unstructured file set to a mod-14 extent boundary.
Partitioned unstructured files must use the same extent size and maximum extents for
all partitions because positioning is dependent upon a consistent size for each of the
partitions. Online migration attempts will abort when an unstructured partitioned file
without mod-14 extent sizes is present on the source disk.
Before migrating to ESS, rebuild all partitions, using a mod-14 extent size. Usually, this
is accomplished by an offline copy to a new partition set.
The FCHECK utility (introduced in G06.24) includes a migration option that reports the
files that cannot be migrated to ESS because of this format limitation, in addition to
reporting the amount of disk space required for check block protection.
Note. For more information about installing and configuring FCSAs or the ESS, contact your
HP service provider.
If IOAM enclosures are installed in the field, they must be installed by service providers trained
by HP. All cabling connections must be performed by your service provider. Have your service
provider refer to the Modular I/O Installation and Configuration Guide, which is located in the
NTL Hardware Service and Maintenance library.