We've had the 3494 for about 5-year and we do have the HA option installed. It is definitely worth it. We had, at different times, a library manager failure and an accessor failure [bearing going out, etc.], but the library just kept going on without interruptions and the CE could work on the accessor failure and library manager failure without downtime. We do not have the dual active accessor code enabled because we do not see the need for it just yet; if our tape mounts/demounts increase dramatically we may purchase that option. However, during a full library inventory, both accessors become active at the same time, reducing our 8-frame library inventory time in half.
Mahesh >>> [EMAIL PROTECTED] 11/08/2005 21:54:27 >>> I am a little behind in reading my mail. But we have an early ship model of the 3494 (SN 10010) and the robot shaft and all the bearings finally gave out. We had this library since the summer of 1993. Over a 5 day period, IBM replace the shaft, x cable, y cable,1 gripper, accessor power supply and all the bearings on the bottom of the robot. We experience about 4 days of scatter outages. It may be time to consider the H1A options. We had every tape specialist in town going thru our shop during those days. The shaft on the early robots was made of machine piece of stainless steel. The replacement was some black Teflon cover metal shaft. -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of David Bronder Sent: Tuesday, October 11, 2005 9:19 AM To: [email protected] Subject: Re: Re: 3494/3584 HA1 High Availability Option - is it worth it? Like Wanda and Bob, we've had our 3494 for coming up on 7 years now. In that time, though, we've never had a robot failure, nor have we had to run in manual mode. We have the dual-gripper option, though, and that's saved us several times when we've had gripper failures. For example, the time the gripper was flinging tapes around inside the library. The bad gripper had to be manually disabled since the LM thought it was fine. But the second gripper kept us in automated mode. Another reason for the HA1 option, though, is performance. If you have a really large 3494 (pushing 16 frames), dual robots apparently can be a big boost to mount service times. Or so says the IBM tape Top Gun who was here over the weekend helping us expand our 3494. Fortunately, our library isn't that big (and I don't expect it to ever get that big). =Dave Prather, Wanda wrote: > > Ditto. > Our 3494 is 7 years old now. > Same experience with failures (1-2 a year). > Same experience waiting for the plane to arrive with parts! > We also just put it in manual mode and tough it out until the repairs > are done.
