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A Sad Mac is a symbol used by older-generation Apple Macintosh computers, starting with the original Macintosh 128K, to indicate a severe hardware or software problem that prevented startup from occurring successfully.
Some operating systems, e.g., z/OS, have facilities for Reliability, availability and serviceability (RAS) and the OS can recover from the crash of a critical component, whether due to hardware failure, e.g., uncorrectable ECC error, or to software failure, e.g., a reference to an unassigned page.
systemd, a software suite providing system components for Linux operating systems, implements a blue screen of death similar to that of Microsoft Windows using a systemd unit called systemd-bsod since August 2023, which was fully added on December 6, 2023 starting with version 255 of systemd. [38]
Of the 171 failures, 60% were due to a general hardware failure (and thus fell under the 3 year extended warranty). And of the remaining 40% which were not covered by the extended warranty, 18% were disc read errors, 13% were video card failures, 13% were hard drive freezes, 10% were power issues and 7% were disc tray malfunctions.
With most mass-market personal computers, an MCE indicates faulty or misconfigured hardware. The nature and causes of MCEs can vary by architecture and generation of system. In some designs, an MCE is always an unrecoverable error, that halts the machine, requiring a reboot.
This design by IBM was modeled after their larger mainframe systems, which would perform a complete hardware test as part of their cold-start process. As the PC platform evolved into more of a commodity consumer device, the mainframe and minicomputer-inspired high-reliability features such as parity memory and the thorough memory test in every ...