Synology: Razlika med običajnimi in RAID diski
Posted by Marko Lipovec (Import), Nazadnje spremenjeno s strani Marko Lipovec (Import) on 29 March 2012 09:09 AM
|
|||||||||
Za strežnike, namenjene krtičnim podatkom v podjetjih priporočamo uporabo diskov RAID, namenjenih prav napravam NAS. Originalen tekst (WesternDigital -WD): http://wdc.custhelp.com/app/answers/detail/a_id/1397
Difference between Desktop edition and RAID (Enterprise) edition drivesAnswer ID 1397 | Last Updated 01/19/2012 <-- --> Western Digital manufactures desktop edition hard drives and RAID Edition (RE) hard drives. Each type of hard drive is designed to work specifically as a stand-alone drive, or in a multi-drive RAID environment. If you install and use a desktop edition hard drive connected to a RAID controller, the drive may not work correctly. This is caused by the normal error recovery procedure that a desktop edition hard drive uses.
When an error is found on a desktop edition hard drive, the drive will enter into a deep recovery cycle to attempt to repair the error, recover the data from the problematic area, and then reallocate a dedicated area to replace the problematic area. This process can take up to 2 minutes depending on the severity of the issue. Most RAID controllers allow a very short amount of time for a hard drive to recover from an error. If a hard drive takes too long to complete this process, the drive will be dropped from the RAID array. Most RAID controllers allow from 7 to 15 seconds for error recovery before dropping a hard drive from an array. Western Digital does not recommend installing desktop edition hard drives in an enterprise environment (on a RAID controller). Western Digital RAID edition hard drives have a feature called TLER (Time Limited Error Recovery) which stops the hard drive from entering into a deep recovery cycle. The hard drive will only spend 7 seconds to attempt to recover. This means that the hard drive will not be dropped from a RAID array. While TLER is designed for RAID environments, a drive with TLER enabled will work with no performance decrease when used in non-RAID environments.
Originalen članek na:Support for WD desktop drives in a RAID 0 or RAID 1 configurationAnswer ID 996 | Last Updated 01/19/2012 <-- --> WD desktop hard drives (Caviar Black, Green, and Blue) have been tested and are recommended for consumer RAID applications when using the drives in a RAID 0 (Stripe) or RAID 1 (Mirror) configuration. However, there are several things to keep in mind when setting up a RAID with these drives:
For more information on the differences between a RAID Edition (RE) drive and a Desktop drive please see Answer ID 1397: What is the difference between Desktop edition and RAID (Enterprise) edition hard drives?. | |||||||||
|