A second hard drive failure in my Promise Pegasus RAID system forces some choices.
hard drive
Being a hybrid, naming disks and volumes can get complex in OS X. This article demystifies them.
Should you defragment files, or free space, in El Capitan, or are they even possible now?
228.7 GB of my internal disk is occupied by ‘Other’. Where has this gone, and how can I reclaim it?
Do third-party disk tools work with Fusion Drives, or are you stuck with just Disk Utility?
If you are running Yosemite or El Capitan, OS X may have changed the way that your boot disk is managed – and how you can maintain and repair it.
Why El Capitan needs an SSD or Fusion Drive, and all about their care and maintenance.
Even the most disorganised adult has some system of discriminating what things are most important – but not computers.
Can I install SATA-600 hard drives in my Mac Pro, which supports SATA-300?
The icon for my 2 TB external drive is greyed out in Disk Utility, and I can do nothing with it. How can I restore its normal function?
The Eclectic Light Company 