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Line 10: − + − Disk mirroring can be accomplished through either software or hardware.+ − + − + − − {{Note box| SME Server 10 differs from SME server 9.2 in that the default install will only configure a Raid 1 configuration regardless of the number of hard drives available. There are selectable install options for other Raid configurations available from the install menu when sufficient hard drives are installed to support that Raid config}} − +
SME Server:Documentation:Administration Manual:Chapter5 (view source)
Revision as of 01:06, 31 March 2021
, 01:06, 31 March 2021→RAID1 Support (Disk Mirroring and striping)
====RAID1 Support (Disk Mirroring and striping)====
====RAID1 Support (Disk Mirroring and striping)====
With SME Server, you have the ability to set up disk mirroring, also called RAID Level 1. In disk mirroring, you basically write all of your data to two separate hard disks installed in your server. One is the mirror of the other. Should the primary disk experience a hardware failure, the mirror disk will continue operations as if nothing had happened. All of your data will be protected from the single disk failure. This does NOT replace the need for backups!
With SME Server, you have the ability to set up disk mirroring and striping, also called RAID. In disk mirroring, you basically write all of your data to two separate hard disks installed in your server. One is the mirror of the other. Should the primary disk experience a hardware failure, the mirror disk will continue operations as if nothing had happened. All of your data will be protected from the single disk failure. This does NOT replace the need for backups! Other levels of RAID offer similar protections.
RIAD can be accomplished through either software or hardware.
=====Software Mirroring=====
=====Software RAID=====
The SME Server comes by default with RAID disk mirroring or striping: the level of RAID depends on the number of drives installed. The server is configured to accept any number of drives and will function properly. You can verify the RAID status from the console. If you later wish to add more drives, just add them and instruct the server via the console to create the mirror. It will take some time to build so do it during scheduled maintenance. They can be either SCSI or SATA or even IDE drives, but we strongly advise they are the same size and type.
The SME Server comes by default with RAID disk mirroring or striping: the level of RAID depends on the number of drives installed. The server is configured to accept any number of drives and will function properly. You can verify the RAID status from the console. If you later wish to add more drives, just add them and instruct the server via the console to create the mirror. It will take some time to build so do it during scheduled maintenance. They can be either SCSI or SATA or even IDE drives, but we strongly advise they are the same size and type or the result will be fixed by the smallest disk.
We strongly recommend that you consult the current technical information on SME Raid at http://wiki.contribs.org/Raid before commencing an install.
We strongly recommend that you consult the current technical information on SME Raid at http://wiki.contribs.org/Raid before commencing an install.
=====Hardware Mirroring=====
=====Hardware Mirroring=====
With hardware mirroring, you use a special RAID disk controller to perform the actual mirroring across multiple disks. As mirroring is performed in hardware, the performance may be faster than software mirroring. Additionally it can simplify configuration because to the operating system the entire RAID disk system looks like one single disk. You should be able to use any supported SATA or SCSI hardware RAID controller. NB: other options than mirroring may be supported by the controller.
With hardware mirroring, you use a special RAID disk controller to perform the actual mirroring across multiple disks. As mirroring is performed in hardware, the performance may be faster than software mirroring. Additionally it can simplify configuration because to the operating system the entire RAID disk system looks like one single disk. You should be able to use any supported SATA or SCSI hardware RAID controller. NB: other options than mirroring may be supported by the controller.
If you are going to use hardware mirroring, you should NOT choose Install - Dual hard disk with software RAID-1 mirroring during the installation process described in section 1.5.4. Installing the Software. (Doing so will enable software mirroring.) Instead, you should do a regular installation of the software. See [[Booting]]
** If you are going to use hardware mirroring, you should NOT choose Install - Dual hard disk with software RAID-1 mirroring during the installation process described in section 1.5.4. Installing the Software. (Doing so will enable software mirroring.) Instead, you should do a regular installation of the software. See [[Booting]]
====Upgrading From A Previous Version====
====Upgrading From A Previous Version====