From: maciej simm (simm@cd4cd8.com)
Date: Tue Dec 23 2003 - 14:51:29 EST
Dear Flowers, First a disclaimer - The opinions expressed in this email are my own and do not represent those of Tree Star Inc. On with the storage rant: The large harddrives are convenient for centralized location of files but should not be used as EXCLUSIVE backup devices. If a disk drive with no redundancy protection fails you lose all the data on the disk. The chances of that on a brand new drive are very minimal - but I personally would not want to take that risk. The only solution that involves hard drives that would be 'safe' is a RAID setup with a drive dedicated to parity information. Quoting Microsoft, "A RAID-5 volume is a fault-tolerant volume with data and parity striped intermittently across three or more physical disks. If a portion of a physical disk fails, you can recreate the data that was on the failed portion from the remaining data and parity. RAID-5 volumes are a good solution for data redundancy in a computer environment in which most activity consists of reading data." price comparison: presented as MB per US Dollar CDR 700MB: (assuming $20 for 50 TDK brand CDR's) 614MB/$ (triplicate protection) or 1842MB/$ (no fail safe) DVDR 4.3 GB (assuming $30 for 15 TDK brand DVDR's) 734MB/$ (triplicate protection) or 2202MB/$ (no fail safe) SATA drive, internal, 250GB (assuming ~240GB after format): (240GB*1024MB/GB)/($225) = 1092MB/$ no fail safe EIDE drive, internal, 250GB (same as above): (240GB*1024MB/GB)/($171) = 1437MB/$ no fail safe Maciej Simm -----Original Message----- From: Fisher, Myrna L [mailto:Myrna.Fisher@med.va.gov] Sent: Monday, December 22, 2003 11:46 AM To: cyto-inbox Subject: RE: hard drive for data storage. Happy Holidays to you, too. I have an external hard drive from MicroNet (www.micronet.com). This was recommended by the Mac Store. I have not tried to store directly from the software program, but I have not had any problems with data storage of FCS files (transferring all files from hard drive to external hard drive)or any graphics files from other programs. Hope this helps. -----Original Message----- From: janet dow [mailto:jldow@unity.ncsu.edu] Sent: Thursday, December 18, 2003 2:20 PM To: cyto-inbox Subject: hard drive for data storage. Happy holiday to all flowers: I recently purchase a extra hardrive(250 GB) to attach to my mac(FACSCalibur) as a way to storage all future data in a central location. I have unfortunatly discovered that the kind I purchased(Iomega HDD 250 GB firewire desktop harddrive) does not like to store data directly from the machine and freezes after about 10 data files. I then have to shut everything down and start everything all over again. I will use the drive for backup storage but would like to purchase one I can store data directly onto. Iomega is trying to help but doesn't really understand the nature of our data. I was hoping someone else might have tried this and found one that works. thanks in advance for all your help-as usual Janet Dow -- Janet Dow Research Technician and Manager Flow Cytometry Facility North Carolina State College of Veterinary Medicine Room C-314 Raleigh, NC 27606 (919)513-6364
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