Data recovery principles outlined DELL EqualLogic PS6100

DELL EqualLogic PS6100 Detailed:
DELL EqualLogic PS6100 virtual ISCSI SAN arrays bring enterprise-class features, intelligence, automation and reliability to remote or branch office, departmental and SMB storage deployment, support for VMware, Solaris, Linux, Mac, HPux , AIX, supports all industry-standard operating systems with iscsi initiator, while providing a full set of enterprise-class data protection and management features, reliable performance, scalability and fault tolerance, is the starting point for medium-sized enterprises class storage products.
The upper application Basic Configuration:
can first initialize memory by connecting the serial port.
Landing configuration through the browser ip address, account default: grpadmin, default password: grpadmin; you can also view the status through the serial port landing.

And access to the volume is divided:

the underlying structure:
In Example 9 disc, dell eq when creating the RAID, the default assigned a hot spare, where only hot spare chassis, not global hot spare
use of discs 8 a group of RAID5, RAID5 in this size 15M for the above dicing divided into one block. Into all the sizes of the blocks 15M inside a storage pool in the storage pool from a re-allocation, storage pool across the array, reassembled into Mdisk, are mapped to different hosts.
Combination, as shown below:

The information in the bitmap to Vdisk permutations and combinations of blocks 15M, 15M a number of blocks are combined into one or several Mdisk, Mdisk allocated to the host and a file system created.
Bitmap information, as shown below:

General fault information collection:
the problem usually occurs or the hard disk controller are a problem, resulting in memory can not be accessed.
After a problem, you can use the serial port connection, view the state of the hard drive, make sure the piece of hardware problems, the command is as follows:
the -Z #raidtool
#raidtool the -Z
#diskview -j


and collected by the network port log information, analysis, the following command:
Telnet -fc: \ eqlog.txt groupIP
SU Exec the bash
the uname -a
the ifconfig -a
DiskView -j
DiskView -Q is
dmesg
the RSTAT
from DBTools has
eqllogmgr -r

analyzed after crawling to the log file, before performing other operations, at all hard drives should be backed up to prevent irreducible subsequent operations, should ensure the safety of the original storage medium , during the subsequent recovery operation.