Red Hat ENTERPRISE LINUX 5.1 DM MULTIPATH Manuale Utente Scaricare il pdf (Pagina 8)

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\_ 3:0:0:0 sdc 8:32 [active][ready]

Now, the abstract device /dev/mapper/Qsandisk which groups /dev/sdb and

/dev/sdc are ready to be used.

Part 3: Mount the file system on iSCSI device at boot time

1. Format the iSCSI device as EXT3 file system.

# mkfs.ext3 /dev/mapper/QsanDisk

2. In order to mount a file system that exits on an iSCSI device connected through

the open-iSCSI software initiator, you need to add a line to the /etc/fstab file.

# vi /etc/fstab

/dev/ mapper/QsanDisk /mnt/DataCoreSAN ext3 _netdev,defaults 0 0

The _netdev option will delay the time when mounting the file system on listed

devices until the network has been started. Also ensures that the file system is

unmounted before stopping the network at shutdown.

Summary

Follow the procedures; it’s easy to implement iSCSI and multipath I/O in RHEL5.

Take advantage of these two convenient packages cooperate with QSAN P series

controllers, enjoy a fault-tolerance and performance enhancement technique.

Applies to

x All QSAN P series controllers FW (20080926_1100)

References

x RHEL 5.1 DM Multipath

http://www.redhat.com/docs/manuals/enterprise/RHEL-5-manual/en-

US/RHEL510/pdf/DM_Multipath.pdf

x Linux Open-iSCSI and MPIO to a SAN

http://chrplunk.blogspot.com/2008/11/linux-open-iscsi-and-mpio-to-san.html

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Red Hat ENTERPRISE LINUX 5.1 DM MULTIPATH Manuale Utente Pagina 8