American manufacturer of hard drives with legendary failure rates. Went out of business 1997-11-10 and eventually morphed into something called Streamlogic.
Their products were some of the most miserable excuses for hardware ever sold and a 100% failure rate on a batch within a year was not uncommon (my personal experience is that all five failed betwen 12 and 24 months of purchase). Some retailers are still trying to offload their stock on unsupecting buyers looking for a deal. Micropolis hard drives have become an industry joke, synonymous with the cheap, defective SCSI hard drives your boss buys for tuppence and expects you to take into production.
Generally speaking, if you have a Micropolis HD in production and it still works, say your thanks to $DEITY that it's lasted as long as it has and buy a replacement before it kicks the bit bucket. You know it will. Luckily, they tend to go flaky before their demise and give you time to replace them.
See ECED: Micropolis Hard Drives for hardware specs.