On Mon, Mar 10, 2014 at 04:48:16PM -0400, Chris Hoogendyk wrote: > One issue that comes up repeatedly is the requirements of a server > and the holding disk configuration to keep an LTO6 (or LTO5) > streaming at something approaching its rated speed, which is faster > than that of an individual disk drive. > > The most common approach is to have an array of high speed disk > drives configured in raid10 or raid5 for holding space to get data > transfer speeds high enough. > > We are trying to set up a new server and a new tape library without > breaking the budget, and we need a lot of external storage just for > storage, even without the question of Amanda and a holding disk. We > have a J4500 hanging off our T5220 and hope to carry it over to a > new Supermicro server. We planned on filling the internal bays on > the Supermicro and using software raid to configure them. We'll be > using Ubuntu LTS, I'm guessing 14.04, since this project will be for > the summer. > > Kicking ideas around for speed, throughput, etc. to drive the LTO, > we came up with the idea of just getting a pair of SSDs for holding > disk space. Those ought to be individually faster than the LTO by a > good bit. > > Has anyone done this? Any comments? >
If looking at SSDs, consider the ones that plug directly into the PCI bus. I see some with TB+ capacities and some list their 'sustained' read speed at 2GB/s compared to SATA's seldom seen 0.6GB/s max. Expensive though. jl -- Jon H. LaBadie [email protected] 11226 South Shore Rd. (703) 787-0688 (H) Reston, VA 20190 (609) 477-8330 (C)
