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OmniDiskSweeper is a freeware disk space analyzer utility for macOS developed by The Omni Group, which recursively searches the filesystem and displays entries sorted and color-coded by size, from largest to smallest.
Diagram of a RAID 1 setup. RAID 1 consists of an exact copy (or mirror) of a set of data on two or more disks; a classic RAID 1 mirrored pair contains two disks.This configuration offers no parity, striping, or spanning of disk space across multiple disks, since the data is mirrored on all disks belonging to the array, and the array can only be as big as the smallest member disk.
DaisyDisk is a paid disk space analyzer for macOS. [3] It displays a sunburst diagram of files on a hard drive to help with the location or deletion of large files. [4] It can display previews of files using Quick Look. [5] [6] [7] It also allows the user to look at the file directly in Finder, in order to delete it or move it elsewhere. [8]
RAID (/ r eɪ d /; redundant array of inexpensive disks or redundant array of independent disks) [1] [2] is a data storage virtualization technology that combines multiple physical data storage components into one or more logical units for the purposes of data redundancy, performance improvement, or both.
ProDOS file system Apple_RAID: RAID: Apple_RAID_OfflineV2: This identifier marks a Mac OS X partition used in a software RAID configuration. It normally contains the same filesystems a regular Mac OS X installation would have, like HFS/HFS+ or UFS. The separate boot partition Apple_Boot is mandatory. Apple_Rhapsody_UFS: Unix File System: Mac OS ...
Xserve RAID. Xserve RAID is a attachment mass-storage server that was offered by Apple Inc. Xserve RAID held up to 14 hot-swappable Ultra-ATA hard drives, and had a capacity of 10.5 TB when filled with 750 GB modules. Xserve RAID supported RAID levels of 0, 0+1, 1, 3 and 5 in hardware, hybrid RAID levels such as 10 and 50 could be created in ...
As a RAID 0 array striped across RAID 5 elements, minimal RAID 50 configuration requires six drives. On the right is an example where three collections of 120 GB RAID 5s are striped together to make 720 GB of total storage space. One drive from each of the RAID 5 sets could fail without loss of data; for example, a RAID 50 configuration ...
Those RAID systems made their way to the consumer market, for users wanting the fault-tolerance of RAID without investing in expensive SCSI drives. Fast consumer drives make it possible to build RAID systems at lower cost than with SCSI, but most ATA RAID controllers lack a dedicated buffer or high-performance XOR hardware for parity calculation.
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