EMC Storage Product Knowledge Sharing

When connecting to an ESX host for the first time, rpowermt prompts the administrator for the username and password of the ESX host. Each new ESX host managed by rpowermt generates a prompt a username and password. The administrator is prompted for a lockbox password once, rpowermt securely stores the following information in a lockbox(encrypted file). -         --ESX host being accessed -     --Username and password of ESX host being accessed, Storing...

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PowerPath Migrator Enabler is a host-base migration tools from EMC that allows you to migrate data between storage systems with little or no interruption to data access. This tool can be use in conjunction with other underlying technology such as EMC Invista, Open Replicator. PPME use the PowerPath filter dirvers to provide non-disruptive or minimally disruptive migrations. Only specific host plateforms are supported by PPME. Please check EMC support matrix for supported host systems. One of the PPME features that supports...

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...

PowerPath Migration Enabler is a host-based software product that enables other technologies, such as array-based replication and virtualization, to eliminate -application downtime during data migrations or virtualization implementations. PowerPath Migration Enabler allows EMC Open Replicator for Symmetrix and EMC Invista customers to eliminate downtime during data migrations from EMC storage to Symmetrix, and during virtualized deployments to Invista.. PowerPath Migration Enabler—which leverages the same underlying technology...

Lets first disuss what is Powerpath software. If you are familiar with EMC product and then definitelly will be using EMC Powerpath software. Those who are new to storage world, it will interesting to know about this product as there are only few software in this category like DMP,PVLINK, LVM etc from other vendor. This sofware is one of the most robust compare to other, thats reason EMC generationg more revenue out of this Product.......

What are the differences between failover modes on a CLARiiON array?A CLARiiON array is an Active/Passive device and uses a LUN ownership model. In other words, when a LUN is bound it has a default owner, either SP-A or SP-B. I/O requests traveling to a port SP-A can only reach LUNs owned by SP-A and I/O requests traveling to a port on SP-B can only reach LUNs owned SP-B. It is necessary to have different failover methods because in certain situations a host will need to access a LUN on the non-owning SP.The following failover...

DMP With CLARiiON:-CLARiiON arrays are active-passive devices that allow only one path at a time to be used for I/O. The path that is used for I/O is called the active or primary path. An alternate path (or secondary path) is configured for use in the event that the primary path fails. If the primary path to the array is lost, DMP automatically routes I/O over the secondary path or other available primary paths.For active/passive disk arrays, VxVM uses the available primary path as long as it is accessible. DMP shifts I/O to...

SUN/SOLARIS___________To display what HBA's are installed.#prtdiag -v#dmesg#cat /var/adm/messages grep -i wwn moreTo set the configuration you must carry out the following:-changes to the /etc/system file-HBA driver modifications-Persistent binding (HBA and SD driver config file)-EMC recommended changes-Install the Sun StorEdge SAN Foundation packageChanges to /etc/system: ( Plz ignore 3 equal sign when u edit the file)SCSI throttle === set sd:sd_max_throttle=20Enable wide SCSI === set scsi_options=0x7F8SCSI I/O timeout value...

LUN Basics Simply stated, a LUN is a logical entity that converts raw physical disk space into logical storage space that a host server's operating system can access and use. Any computer user recognizes the logical drive letter that has been carved out of their disk drive. For example, a computer may boot from the C: drive and access file data from a different D: drive. LUNs do the same basic job. "LUNs differentiate between different chunks of disk space. "A LUN is part of the address of the storage that you're presenting...