It is possible to add more logs to a RAID-5 volume at a later time. The number of logs must equal the number of disks that is specified to logdisk. Ncol=3 nlog=2 logdisk=mydg07,mydg08 mydg04 mydg05 mydg06 # vxassist -b -g mydg -o ordered make volraid 10g layout=raid5 \ It also creates two RAID-5 logs on disks mydg07 and mydg08. logdisk= disk \įor example, the following command creates a 3-column RAID-5 volume with the default stripe unit size on disks mydg04, mydg05 and mydg06. Use the following form of the vxassist command to specify the disks from which space for the logs is to be allocated: # vxassist -o ordered make volume length \ Veritas use (s) such Collected Data to enable, optimize and provide the Service or maintenance/support to You (and may engage third parties to do so as well) and to improve Veritas's products and services in general, including by reviewing aggregate data for statistical analyses. If you use ordered allocation when creating a RAID-5 volume on specified storage, you must use the logdisk attribute to specify on which disks the RAID-5 log plexes should be created. Having two RAID-5 log plexes for each RAID-5 volume protects against the loss of logging information due to the failure of a single disk. The Download button will appear once you check the first file. Check the box next to each file that you wish to download, then click Download. These log plexes should be located on different disks. Download instructions Base and upgrade installers Click Base and upgrade installers to view the files associated with this product version. It is suggested that you configure a minimum of two RAID-5 log plexes for each RAID-5 volume. To support concurrent access to the RAID-5 array, the log should be several times the stripe size of the RAID-5 plex. A VxVM volume appears to applications and the operating system as a physical disk on which file systems, databases and other managed data objects can be configured. RAID-5 logs can be concatenated or striped plexes, and each RAID-5 log associated with a RAID-5 volume has a complete copy of the logging information for the volume. VeritasTMVolume Manager (VxVM) by Symantec is a storage management subsystem that allows you to manage physical disks as logical devices called volumes. If you require RAID-5 logs, you must use the logdisk attribute to specify the disks to be used for the log plexes. It also creates two RAID-5 logs rather than the default of one log. This creates a RAID-5 volume with the default stripe unit size on the default number of disks. If you are cant wait to read on, just download the sample, and play about with it.This 30-line spreadsheet condenses the contents of this 218-line vxprint output. Specify the -b option if you want to make the volume immediately available for use.įor example, to create the RAID-5 volume volraid together with 2 RAID-5 logs in the disk group, mydg, use the following command: # vxassist -b -g mydg make volraid 10g layout=raid5 nlog=2 To create a RAID-5 volume, use the following command: # vxassist make volume length layout=raid5 \ Do not create a RAID-5 volume with more than 8 columns because the volume will be unrecoverable in the event of the failure of more than one disk.
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