Controller is an Adaptec 29160, 3.10 firmware (most current), drives are IBM of mixed models.. DDYS, DNES, DMVS, (more, but don't remember the models off-hand)
Symptoms are that a drive (operating under normal interface speeds, and default controller settings, the only drive on the bus, or even among many drives) will intermittently emit an audible high-pitch sound for a short duration; 2 seconds or less..
For at least a year with this setup, there were no instances of drive failure and there was no audible pitch from the drives.. One of the drives eventually failed, suspectedly due to power-supply problem (Enermax 650Watt) giving an inadequate supply of power to the drives when they were under load.
About two years later now, five RMAed drives from IBM, I'm beginning to suspect the controller.. however, I haven't come across any utilities that could allow testing for a failing controller card, much less have experienced a controller failing other than outright failing; drives not being usable, at all.
Maybe one of the 9,699,481 members here has experienced a not-all-the-way up-to snuff SCSI controller and can relate some observations..
Symptoms are that a drive (operating under normal interface speeds, and default controller settings, the only drive on the bus, or even among many drives) will intermittently emit an audible high-pitch sound for a short duration; 2 seconds or less..
For at least a year with this setup, there were no instances of drive failure and there was no audible pitch from the drives.. One of the drives eventually failed, suspectedly due to power-supply problem (Enermax 650Watt) giving an inadequate supply of power to the drives when they were under load.
About two years later now, five RMAed drives from IBM, I'm beginning to suspect the controller.. however, I haven't come across any utilities that could allow testing for a failing controller card, much less have experienced a controller failing other than outright failing; drives not being usable, at all.
Maybe one of the 9,699,481 members here has experienced a not-all-the-way up-to snuff SCSI controller and can relate some observations..