Lotus Notes’ RAID technology assists protect data from being destroyed in the event of a disk failure. It connects multiple hard disk drives into one file system, and employs fail-tolerance to restore information in the event that a single drive fails. This kind of technology is an excellent choice for companies who need to ensure that their data continues to be available throughout the day.
A raid for lotus notes iDataAgent catalog locates the transaction log of a database and connects it to a specific Notes database. The transaction log is divided into smaller data files called sign extents. Each is 64MB. Each sign extent contains an entry that indicates the date when the database was created and also the date it was run by the Fixup program.
There are various levels of raid. Each one offers a different performance and the ability to tolerate faults. RAID 1 is most common since it makes use of mirroring to double the storage capacity. But it’s not foolproof. If the failed disk is mirrored it can take hours to restore data from the remaining drives. RAID 5 is another option that combines striping and parity to offer good storage and performance. It requires two additional disks to achieve parity, but provides the best balance of storage and efficiency.