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ZFS (previously Zettabyte File System) is a file system with volume management capabilities. It began as part of the Sun Microsystems Solaris operating system in 2001. Large parts of Solaris, including ZFS, were published under an open source license as OpenSolaris for around 5 years from 2005 before being placed under a closed source license when Oracle Corporation acquired Sun in 2009–2010.
ZFS: 1023 bytes Any Unicode except NUL No limit defined [cf] 16 EiB (18.44 EB) 281,474,976,710,656 YiB (2 128 bytes) 2 128: File system Maximum filename length Allowable characters in directory entries [cc] Maximum pathname length Maximum file size Maximum volume size [cd] Max number of files
Advantages include lower power consumption than standard RAID levels, the ability to use multiple hard drives with differing sizes to their full capacity and in the event of multiple concurrent hard drive failures (exceeding the redundancy), only losing the data stored on the failed hard drives compared to standard RAID levels which offer ...
Oracle Solaris 10 and 11 support 4Kn and 512e hard disk drives for non-root ZFS file systems, while version 11.1 provides installation and boot support for 512e devices. [19] Prior to Windows Vista , Windows 2000 and Windows XP use 4096 bytes as default allocation unit size when use NTFS to format local hard disks, but do not align to 4096-byte ...
The ZFS filesystem can likewise pool multiple devices of different sizes and implement RAID, though it is less flexible, requiring the creation of virtual devices of fixed size on each device before pooling. [11] In enterprise environments, enclosures are used to expand a server's data storage by using JBOD [12] devices. This is often a ...
If the actual size of the disk exceeds the maximum partition size representable using the legacy 32-bit LBA entries in the MBR partition table, the recorded size of this partition is clipped at the maximum, thereby ignoring the rest of the disk. This amounts to a maximum reported size of 2 TiB, assuming a disk with 512 bytes per sector (see 512e).
The size and shape of any device are largely driven by the size and shape of the components used to make that device. Traditional HDDs and optical drives are designed around the rotating platter (s) or optical disc along with the spindle motor inside.
IBM's first hard drive, the IBM 350, used a stack of fifty 24-inch platters and was of a size comparable to two large refrigerators. In 1962, IBM introduced its model 1311 disk, which used six 14-inch (nominal size) platters in a removable pack and was roughly the size of a washing machine. This became a standard platter size and drive form ...