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Nevertheless, the drives should be considered as being engineered for less than 24x7 duty. In a business computing environment, this should be considered an additional risk that can be mitigated by buying 'enterprise-class' storage; i.e. pretty much anything SCSI or a NAS/SAN. Some businesses may accept the risk; that's fine as long as the risk is understood. I originally mentioned the 100K documents/year. The average size is supposedly going to be 100-150K so we're talking 10-15GB/year (+ file system overhead). Retention rquirements haven't been ironed out yet but I imagine we'll only keep at most 3 years of images live and archive anything older. So a single 35GB drive will likely suffice. The incremental cost to grow a RAID set by 1 drive is not bad. Compare that to a single-CPU (Celeron, no less) 1-U minimal Dell PowerEdge 750 (the cheapest rackmount server they have) and you'll see the costs are not far apart. The additional drive for the iSeries is actually cheaper when you factor in an OS for the server (if non-Linux), HW maintenance, etc. And that's raw hardware alone. For administration of the file server, there are a lot of components. We probably have to provide one for DR (double the hardware costs), it has to be backed up, it will have to be kept current on patches (probably), AV (definitely), etc. Software licenses have to be procured and kept up to date. You need a backup device, plan, media, software, etc. There's the administrative overhead of tracking everything. You have to provide rack, power/UPS, cooling, etc. for it. For normal operation, there's not much in the way of troubleshooting performance issues, but there are plenty of tasks that have to be done, both one-time and ongoing. All of these things are already being done on the iSeries. Add the disk, update your backup plan, and run with it. Much easier & cheaper to set up and to administer.
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