Shulou(Shulou.com)06/01 Report--

It is believed that many inexperienced people have no idea about how to install RAC under AIX. Therefore, this article summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

To install rac, set reserve_lock (reserve_policy) to NO or no_reserve, because RAC requires a concurrent shared disk, so the disk cannot be locked by one machine.

If you don't set it up, you can't say when something will go wrong.

Action:

To enable simultaneous access to a disk device from multiple nodes, you must set the appropriate Object Data Manager (ODM) attribute listed in the following table to the value shown, depending on the disk type:

Disk Type Attribute Value

SSA, FAStT, or non-MPIO-capable disks reserve_lock no

ESS, EMC, HDS, CLARiiON, or MPIO-capable disks

Reserve_policy no_reserve

To determine whether the attribute has the correct value, enter a command similar to the following on all cluster nodes for each disk device that you want to use:

# / usr/sbin/lsattr-E-l hdiskn

If the required attribute is not set to the correct value on any node, then enter a command similar to one of the following on that node:

■ SSA and FAStT devices

# / usr/sbin/chdev-l hdiskn-a reserve_lock=no

■ ESS, EMC, HDS, CLARiiON, and MPIO-capable devices

# / usr/sbin/chdev-l hdiskn-a reserve_policy=no_reserve

=

To enable simultaneous access to multiple nodes for disk devices, values must be set depending on the data Manager (ODM) properties of the corresponding objects listed in the table under the disk type:

Disk type property value

Sub-Saharan Africa, FAStT or non-MPIO can disk reserve_lock without

ESS, EMC, HDS, CLARiiON, or MPIO capable disk

Reserve_policy no_reserve

To determine if the attribute has the correct value, enter a command similar to the following on all cluster nodes for each disk device you want to use:

# / usr/sbin/lsattr-E-l hdiskn

If the desired attribute is not set to the correct value on any node, then enter a command similar to the following on that node:

■ SSA and FAStT Devic

# / usr/sbin/chdev-l hdiskn-reserve_lock = none

■ ESS, EMC, HDS, CLARiiON, and MPIO energy devices

# / usr/sbin/chdev-l hdiskn-reserve_policy = no_reserve

To enable simultaneous access to multiple nodes for disk devices, values must be set depending on the data Manager (ODM) properties of the corresponding objects listed in the table under the disk type:

Disk type property value

Sub-Saharan Africa, FAStT or non-MPIO can disk reserve_lock without

ESS, EMC, HDS, CLARiiON, or MPIO capable disk

Reserve_policy no_reserve

To determine if the attribute has the correct value, enter a command similar to the following on all cluster nodes for each disk device you want to use:

# / usr/sbin/lsattr-E-l hdiskn

If the desired attribute is not set to the correct value on any node, then enter a command similar to the following on that node:

■ SSA and FAStT Devic

# / usr/sbin/chdev-l hdiskn-reserve_lock = none

■ ESS, EMC, HDS, CLARiiON, and MPIO energy devices

# / usr/sbin/chdev-l hdiskn-reserve_policy = no_reserve

To enable simultaneous access to multiple nodes for disk devices, values must be set depending on the data Manager (ODM) properties of the corresponding objects listed in the table under the disk type:

Disk type property value

Sub-Saharan Africa, FAStT or non-MPIO can disk reserve_lock without

ESS, EMC, HDS, CLARiiON, or MPIO capable disk

Reserve_policy no_reserve

To determine if the attribute has the correct value, enter a command similar to the following on all cluster nodes for each disk device you want to use:

# / usr/sbin/lsattr-E-l hdiskn

If the desired attribute is not set to the correct value on any node, then enter a command similar to the following on that node:

■ SSA and FAStT Devic

# / usr/sbin/chdev-l hdiskn-reserve_lock = none

■ ESS, EMC, HDS, CLARiiON, and MPIO energy devices

# / usr/sbin/chdev-l hdiskn-reserve_policy = no_reserve

To enable simultaneous access to multiple nodes for disk devices, values must be set depending on the data Manager (ODM) properties of the corresponding objects listed in the table under the disk type:

Disk type property value

Sub-Saharan Africa, FAStT or non-MPIO can disk reserve_lock without

ESS, EMC, HDS, CLARiiON, or MPIO capable disk

Reserve_policy no_reserve

To determine if the attribute has the correct value, enter a command similar to the following on all cluster nodes for each disk device you want to use:

# / usr/sbin/lsattr-E-l hdiskn

If the desired attribute is not set to the correct value on any node, then enter a command similar to the following on that node:

■ SSA and FAStT Devic

# / usr/sbin/chdev-l hdiskn-reserve_lock = none

■ ESS, EMC, HDS, CLARiiON, and MPIO energy devices

# / usr/sbin/chdev-l hdiskn-reserve_policy = no_reserve

To enable simultaneous access to multiple nodes for disk devices, values must be set depending on the data Manager (ODM) properties of the corresponding objects listed in the table under the disk type:

Disk type property value

Sub-Saharan Africa, FAStT or non-MPIO can disk reserve_lock without

ESS, EMC, HDS, CLARiiON, or MPIO capable disk

Reserve_policy no_reserve

To determine if the attribute has the correct value, enter a command similar to the following on all cluster nodes for each disk device you want to use:

# / usr/sbin/lsattr-E-l hdiskn

If the desired attribute is not set to the correct value on any node, then enter a command similar to the following on that node:

■ SSA and FAStT Devic

# / usr/sbin/chdev-l hdiskn-reserve_lock = none

■ ESS, EMC, HDS, CLARiiON, and MPIO energy devices

# / usr/sbin/chdev-l hdiskn-reserve_policy = no_reserve

To enable simultaneous access to multiple nodes for disk devices, values must be set depending on the data Manager (ODM) properties of the corresponding objects listed in the table under the disk type:

Disk type property value

Sub-Saharan Africa, FAStT or non-MPIO can disk reserve_lock without

ESS, EMC, HDS, CLARiiON, or MPIO capable disk

Reserve_policy no_reserve

To determine if the attribute has the correct value, enter a command similar to the following on all cluster nodes for each disk device you want to use:

# / usr/sbin/lsattr-E-l hdiskn

If the desired attribute is not set to the correct value on any node, then enter a command similar to the following on that node:

■ SSA and FAStT Devic

# / usr/sbin/chdev-l hdiskn-reserve_lock = none

■ ESS, EMC, HDS, CLARiiON, and MPIO energy devices

# / usr/sbin/chdev-l hdiskn-reserve_policy = no_reserve

Translation:

To enable simultaneous access by multiple nodes to disk devices, the values must be set depending on the data Manager (ODM) properties of the corresponding objects listed in the table under the disk type:

Disk type property value

SSA, FAStT, or non-MPIO-capable disks

Reserve_lock no

ESS, EMC, HDS, CLARiiON, or MPIO-capable disks

Reserve_policy no_reserve

To determine if the attribute has the correct value, enter a command similar to the following on all cluster nodes for each disk device you want to use:

# / usr/sbin/lsattr-El hdiskn

If the desired attribute is not set to the correct value on any node, then enter a command similar to the following on that node:

■ SSA and FAStT Devic

# / usr/sbin/chdev-l hdiskn-a reserve_lock=no

■ ESS, EMC, HDS, CLARiiON, and MPIO energy devices

# / usr/sbin/chdev-l hdiskn-a reserve_policy=no_reserve

After reading the above, have you mastered how to install RAC under AIX? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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