User manual QUANTUM A-SERIES FTP FILE SERVER 07-2008

[. . . ] A-Series FTP File Server A-Series FTP File Server 81-81800-03 A01 Quantum A-Series FTP File Server User's Guide, 81-81800-03 A01, July 2008. Quantum Corporation provides this publication "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability or fitness for a particular purpose. Quantum Corporation may revise this publication from time to time without notice. Making copies or adaptations without prior written authorization of Quantum Corporation is prohibited by law and constitutes a punishable violation of the law. [. . . ] opens a window about product versions and licenses of the A-Series server and FTP client (see figure 50). The first version number listed is the version of the server firmware. Quantum A-Series FTP File Server User's Guide 54 Chapter 2 Using the FTP File Server FTP File Transfers Figure 50 Information on Software Licenses Window · From the Contextual menu, click Prepare for magazine unload. This will disconnect all current FTP connections and move all tapes back to slots within an A-Series autoloader. Execute this command to make sure that a desired cartridge does not remain in the tape drive while unloading magazines from the autoloader. Note: It is strongly recommended that this command be executed prior to shutting down any SuperLoader 3A Series system. This command is disabled for the standalone A-Series tape drive. Quantum A-Series FTP File Server User's Guide 55 Chapter 2 Using the FTP File Server FTP File Transfers File System Limitations 2 The following lists summarize a number of file system limitations. File Names and Entries · The maximum file name length is 97 characters, including the file name extension. · As of version 3. 0, file names or folder names may contain any UTF-8 characters in any combination up to the 97 character limit. This limit is for each individual file or folder item, so a full pathname can be much longer. Note: While any characters in a file name can be used, many names may not be compatible on platforms other than the one they came from and thus may cause errors upon restore to other computers (see A-Series Best Practices on page 57) for recommendations on file naming. 2 · The maximum number of entries per Table of Contents on each tape (including both files and folders) depends upon a variety of factors. Rough estimates for the capacity of SDLT 600A systems are 10-12, 000 entries and for LTO-3A systems are 150, 000 entries. In general, shorter file names allow for a greater maximum number of files per tape. Quantum A-Series FTP File Server User's Guide 56 Chapter 2 Using the FTP File Server A-Series Best Practices A-Series Best Practices Over the past few years, Quantum has gained experience with the A-Series drives as to a number of practices which can make the user experience smoother. This section gathers some of these items to help our customers have the best possible experience. Networking Considerations 2 These drives connect over Gigabit Ethernet (GbE), and that networking technology officially requires CAT6 or better quality cabling. Many users find that older CAT5E or even plain CAT5 wiring works fine over short runs as long as all 8 wires are employed (some older Ethernet cables only have 4 wires connected and these will not work at all). If you are experiencing network issues, cabling quality and length of runs are one of the first places to consider. In the past, connecting Ethernet devices without a router or switch required a "flipped" cable which swaps transmit and receive pairs. This is automatically detected and accommodated by A-Series drives as with all other GbE products. Gigabit Ethernet is backwards compatible so you can connect an A-Series drive to 100Base or even 10Base networks although your transfer speed will be much slower than even these networks can accommodate since the drive must stop each time it runs out of data and then restart when it gets the next packets. The Jumbo Frames setting is discussed in the configuration sections but is worth mentioning here. It allows transfers of much larger packets and most GbE devices can accommodate them (for instance, all MacPro computers have dual Jumbo Frame enabled GbE ports). Enabling Jumbo Frames provides about a 25% increase in performance in our experience. You will have to experiment in your environment, but it should be worth trying. When Directory Updates Occur 2 It is important for users to understand that the directory (also known as the TOC or Table of Contents) is only updated when the user fully disconnects from the drive. [. . . ] This is why there is no periodic cleaning prescribed for DLT tape drives. self-cleaning head Found in all DLT tape drives. Tiny ridges on either server A powerful computer system with a large capacity tape or hard disk drive that serves the information access and communication needs of multiple users. shelf life The length of time that media can be stored without losing its magnetic strength. For Super DLTtape II media, this period is 30 years or more. gravity, of how much shock a tape drive can sustain without damage. Operating and non-operating shock levels are usually specified separately. shock rating A rating, expressed in Gs which stands for multiples of SITE SMTP SNMP SNTP This command is used for site-specific commands. [. . . ]