In the past, SAS recommended the striping of the SAS WORK file system (RAID0) without redundancy/high availability for the best performance. This was rationalized because the files created in this file system are temporary in nature
and can not be re-accessed if the file system or SAS session crashes. However, many customers now have the requirement of a highly available SAS WORK file system. Once again RAID10 generally will give the best redundancy and performance for a highly available storage solution. In addition, RAID5 (especially on the storage arrays that have large amounts of cache) is also very popular and can perform as well as RAID0 configurations.