EMC Storage Product Knowledge Sharing

Auto-provisioning requires Enginuity 5874 or later. It simplify Symmetrix provisioning by allowing you to create group of devices like storage group in CLARiiON, Front-End Port Group and Host Initiators Group and then associate these groups with each other in a masking view.The following are the basic steps for provisioning Symmetrix using Auto-Provisioning:-1) Create a Storage Group2) Create a Port Group3) Create an Initiator Group4) Associate the groups in a Masking View.Creating Storage Group:- It is component of Auto-Provisioning...

SRDF/S and SRDF/A configuration involves tasks such as suspending and resuming the replication, failover from R1 side to R2, restoring R1 or R2 volumes from their BCV, and more. You perform these and other SRDF/S or SRDF/A operations using both symrdf and TimeFinder command symmir. The below details are for SRDF Pair states during SRDF procedure.SyncInProg :- A synchronization is currently in progress between the R1 and the R2. There are existing invalid tracks between the two pairs and the logical link between both sides of...

Symmetrix Optimizer improves array performance by continuously monitoring access patterns and migrating devices to achieve balance across the disks in the array. This is process is carried out automatically based on user-defined parameters and is completely transparent to end users, hosts and applications in the environment. Migration is performed with constant data availability and consistent protection.Optimizer performs self-tuning of Symmetrix data configurations from the Symmetrix service processor by:· Analyzing...

A multipath requirement for different storage arrays:-All storage arrays: - Write cache must be disabled if not battery backed.Topology: - No single failure should cause both HBA and SP failover, especially with active-passive storage arrays.IBM TotalStorage DS 400 Family (formely FastT) –Defaul host type must be LNXCL or Host Type must be LNXCL orAVT (Auto Volume Transfer) is disabled in this host mode.HDS 99xx and 95xx family – HDS 9500V family (Thunder)- Requires two host modes:Host mode 1 – standardHost mode 2 – Sun...

Return code handling for Windows and UNIX The following lists the possible status or error codes that can be returned by the various SYMCLI commands on a Windows or UNIX platform and useful for troubleshooting.Code Code symbol Description___________________________________________________ 0 CLI_C_SUCCESS CLI -- call completed successfully. 1 CLI_C_FAIL CLI - call failed. 2 CLI_C_DB_FILE_IS_LOCKED- Another process has an exclusivelock...

EMC introduced PowerPath Confgiuration Checker tools for customer. I thought to share about this. It will be very useful for those guys who are using PowerPath as a host fail-over software. It checks existing configuration with EMC support matrix and give you details reports about your configuration whether existing configuration is as EMC support guidelines. This tool is currently available for Windows Operating system.It tests the following check:· OS version verification· Machine Architecture as per ESM(EMC...

Any disk drive from any manufacturer can exhibit sector read errors due to media defects. This is a known and accepted reality in the disk drive industry, particularly with the high recording densities employed by recent products. These media defects only affect the drive’s ability to read data from a specific sector; they do not indicate general unreliability of the disk drive. The disk drives that EMC purchases from its vendors are within specifications for soft media errors according to the vendors as well as EMC’s own Supply...