A RAID-5 volume is a fault-tolerant volume with data and parity striped intermittently across three or more physical disks. RAID 5 stores data on each drive at the same time in the form of blocks as stripes. RAID 5 efficiency increases, the number of disks increases. If a part should fail a physical hard drive, can the data that was on the failed portion from the remaining data and parity. RAID-5 volumes are a good solution for data redundancy in a computer environment, in der die meisten Tätigkeit darin besteht, Daten zu lesen.
Mit keine dedizierten Parity-Laufwerk die Schreib-Performance ist besser, mit überlappenden Daten und Parität Update schreibt. Lesen Transaktionen lassen sich wie alle Laufwerke enthalten Daten Streifen interleaved "sein. RAID 1 führt schneller, aber RAID 5 bietet eine bessere Storage-Effizienz. Parity-Update kann effizienter durch RAID 5 behandelt, indem Sie für die Daten Bit ändert und nur die Änderung der entsprechenden Parity-Bits. writes for small data for improvement here, since most of the hard drive upgrade for all sectors, all writing is lost. For larger writes only the sectors where little change is needed to be rewritten and improved. maintaining parity information reduces write performance? in some cases as low as one third of the speed of RAID-1 . For this reason, RAID 5 usually are not used in the performance of critical processes.
RAID 5 offers data and facts Security and requires three or more disks. If one fails from the hard disk can be accessed can work the raid on the data and the user, but reduced level. Some raids will use the hot spare drive for itself and rebuild the RAID. A hot spare drive is a hard drive in a server that is damaged for the automatic use in case of a drive is defined. If a drive fails, the system automatically switches to the hot spare drive, and the data is reconstructed from the dead hard drive on the hot-spare disk. The system does not shut down and the controller card is rebuilding to do. In other cases, users have to shut down the RAID to replace the failed drive. mined at the level it is no fault tolerance. user needs to replace the failed drive as quickly as possible to lesson the chances of data loss. If one had removed the drives in RAID an issue of data loss is inevitable.
In RAID-5 , data is lost when user problems with multiple hard drives. If you have problems with the RAID-5 , Check the drives and check if they work physically. In most systems, the green light is on the hard disk container let you know if it works. You can drive in the BIOS .
If two or more drives have problems, shut down the server. you need professional help. Further work with the RAID can to complete loss of data.
Please do not regenerate or rebuild the RAID , wenn zwei oder mehr Laufwerke physisches Problem haben. Dies kann zu einem Datenverlust führen abzuschließen. Wenn Sie ein Problem hatte, rufen Sie uns an, um weitere Unterstützung für RAID 5 Wiederherstellung von Daten.
0 comments:
Post a Comment