Lotus Notes' RAID technology assists protect data from destruction in the event of a disk failure. It blends multiple drives on hard disks into one file system and utilizes fail-tolerance to rebuild information in the event of a single drive failure. This type of technology is an excellent option for companies that want to ensure that their data continues to be available throughout the day.
A search in the lotus notes iDataAgent Catalog retrieves a database's transaction log and affixes it with a specific Notes Database. The transaction log is broken down into smaller data files known as sign extents. Each sign extent is 64MB. Each sign extent includes an entry that identifies when the database was constructed and also the date when the Fixup activity performed it before.
There are different levels of raid. Each level offers different performance and failure tolerance. RAID 1 is the most frequent, since it makes use of mirroring to basically double the storage capacity of the system. It's not foolproof. It can take a long time for the remaining drives to recover the data in the event that the mirror disk fails. RAID 5 is a combination 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.