SOFTRAID HARD DRIVE NOT MOUNTING MAC OS X
SOFTRAID HARD DRIVE NOT MOUNTING ARCHIVE

RAID setsĪre susceptible to performance at the lowest common denominator.

Use identical drives if possible-This will ensure consistent size and performance for all drives in the RAID set.

Here are some software-based RAID guidelines:

Nevertheless, you should follow a couple rules to ensure You can use just about any combination of drives to create a RAID set.

SOFTRAID HARD DRIVE NOT MOUNTING MAC OS X

Is that the user will see one large volume instead of several separate drives.Ĭlick to view larger image Creating a RAID SetĬreating a RAID set with Mac OS X is only slightly more complicated than formatting a standard disk or flash drive. With a concatenatedĭisk set, the system will simply continue on to the next drive once the previous drive is filled. Get increased performance and redundancy.Ĭoncatenated disk set-This isn’t what most would consider a true RAID configuration, as not all drives are being used simultaneously. However, when you combine their features you

These nested configurationsĪre certainly more complicated and require a minimum of four separate drives. In other words, you can stripe data between two mirrors, or you can mirror data on two stripes. Nested RAID, 1+0 or 0+1-Because RAID 0 and RAID 1 offer opposed feature sets, nesting one type inside of the other can provide the features of both. RAID 1 set from the Disk Utility application. You should periodically check the status of a Only a single drive in your RAID set, effectively disabling the redundancy. Keep in mind that with a RAID 1 set, if a drive fails your Mac may keep running without warning you. Mirrored RAID set, all file system changes are applied immediately to all drives in the set and no archival history is maintained. If hardware failure occurs, you can recover from a previous backup version of the data.

SOFTRAID HARD DRIVE NOT MOUNTING ARCHIVE

Backup solutions create an archive of the data frozen in time and save it Even so, it’s very important to remember that mirroring is not a backup solution. In short, RAID 1 is space-inefficient and partially slower but provides drive redundancy and decreased risk of data loss due RAID 1 decreases your chances of data loss by providing redundancy. The primary advantage to a RAIDġ set is that it can survive and recover from hardware failure. Write performance is no faster than a single drive, whereas read performance is increased. This yields a single volume that is the same size as a single drive. RAID 1-Commonly called mirroring, RAID 1 writes the same data to each drive in the set. In short, RAID 0 is space efficient and fast but provides no redundancy and increased risk. In fact, RAID 0 increases your chances of data loss because you are introducing The set fails, then all the data is lost. On the other hand, RAID 0 offers zero increase in reliability since if just one drive in This yields a single large volume, with dramatically increased read and write performance, equivalent to the cumulative sizeĪnd performance of all the drives. RAID 0-Commonly called striping, RAID 0 splits up the data into multiple pieces, and then simultaneously writes each piece to a different drive in the set. Mac OS X built-in software-based RAID supports: The two separate sides of an Xserve RAID into a single huge volume. You can use the built-in software-based RAID to further combine hardware-based RAIDs.

Softraid hard drive not mounting