WANCHO@Simtel20.ARPA (09/07/84)
From: "Frank J. Wancho" <WANCHO@Simtel20.ARPA> The RP06 disk pack which you know as our MICRO: structure apparently had developed one or more bad spots over the year it has been in service, and was finally detected sometime last week. Such latent errors are not handled well by the system, with one error generating others and eventually giving the appearance of a degenerating system, masking the original error, and eventually crashing the system. The problem was correctly diagnosed yesterday afternoon, and a fresh disk pack was brought online, initialized, and the MICRO: filesystem was restored from Friday's full backup and Wednesday night's incremental backup tapes. The integrity of the structure was thoroughly checked and a new backup run was then made and ran to completion without errors. In the process, I created the structure with no swapping pages reserved for system use. Thus, we have recovered about 7,000 additional disk pages available for still more files to be stored. We now have plenty of room for the 16 new SIG/M disks arrived in the interim. They will be uploaded next week. Watch for an announcement. Those of you who may have experienced difficulty with FTPing files from MICRO: between last Thursday and yesterday, please try again. If you have any problems, let me know. --Frank