Week 29 - Partitions and File Systems Flashcards
What are the 3 partition record types?
GPT
GUID Partition Table
Modern Mac and PC format
MBR
Master Boot Record
Older PC format
APM
Apple Partition Map
Mostly obsolete Mac format
What is a file system?
Data is written to a drive in addressable units (~4kb) called allocation units/clusters (clusters are groupings of sectors/cells)
What is an allocation table?
Part of a file system that keeps track of used and unused clusters
With regards to HDDs and SDDs, what happens when a file is deleted?
When a file is deleted and trash is emptied, the directory and allocation table are updated
HDD: Data usually remains on the disk and may be recovered
SSD: Data is usually deleted from the drive and cannot be recovered
What is a directory?
Part of a file system that keeps track of a file’s initial cluster address and how files/folders relate to each other. It is updated when read/writes occur
What file systems are used with Pro Tools on Mac and Windows?
MacOS
HFS+ or APFS
FAT32 and NTFS cannot be record volumes
Windows
NTFS
FAT32 cannot be record volumes
What are the 2 steps taken when partitioning?
Partition drive to create Partition(s) and Partition Record
Format Volume(s) with file system. Creates necessary structures - allocation table, directory etc
What are the Native Partitioning/Formatting Programs on Mac and Windows?
Mac: Disk utility
Windows: Disk Management
What is APFS?
A modern & robust next gen FS
A new logical storage unit - the container
Keep in mind:
Designed for SSDs
Will work with HDDs, but not a great choice for HDD audio drives
Can be read by sierra+, so not a choice for external drives if using with older versions of macOS
What differentiates APFS from HFS+?
Virtual Memory
Portion of drive space used as additional memory
How much space should we keep free on a drive and how can we surmise that the drive is getting full?
About 15%
Degraded write performance
