Lotus Notes’ RAID technology can help safeguard data from being destroyed in the event of a disk failure. It is a system that combines multiple hard disk drives to form one file system, and utilizes fail-tolerance to restore information in the event that a single drive fails. This kind of technology is an excellent option for businesses who want to ensure that their information continues to be available throughout the day.
A search in the Lotus Notes iDataAgent catalog obtains the transaction log of a database and associates it with a specific Notes database. The transaction log is split into smaller data files, known as sign extents. Each one is 64MB. Each sign extent contains an entry that identifies the date of creation of the database and also the date it was executed by the Fixup activity.
There are several levels of raid. Each level offers different performance and the ability to handle faults. RAID 1 is most common since it makes use of mirroring in order to double the storage capacity. It’s not foolproof. If the mirroring disk fails it can take hours to recover data from the remaining drives. RAID 5 is an amalgamation of striping and parity, which provides excellent storage and performance. It requires two additional disks for parity, but provides the best balance of storage and efficiency.