U

Index

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U (rack units)
U factors
UDMA (Ultra-DMA)
     Mode 5
     Mode 6
UDP (User Datagram Protocol)
UL 1449 specification
UL 60601-1 medical electrical equipment
UL.com
ULi.com
Ultra 2 SCSI
Ultra 3 SCSI
Ultra ATA disk drives
Ultra ATA/100 disk drives
Ultra ATA/133 disk drives
Ultra ATA/66 disk drives
Ultra SCSI 2nd
Ultra160 SCSI 2nd
Ultra160+ SCSI
Ultra2 SCSI standard
Ultra3 SCSI standard
Ultra320 SCSI 2nd 3rd
Ultra4 SCSI 2nd
Ultra5 SCSI 2nd
Ultra640 SCSI 2nd
UltraBac
UltraSPARC processors 2nd
Ultrium
     data writing process
     development
     drive configuration and installation
     LTO-1 drive standard
     LTO-2 drive standard
     LTO-3 drive standard
     NVRAN chip calibration
     servo tracks
     Ultrium-1 (LTO format)
     Ultrium-2 (LTO format)
UMA (Upper Memory Area)
     adapter ROM
     host adapter BIOS
     IPL ROM
     motherboard BIOS
     shared memory
     video RAM
unbalanced signaling
unbuffered memory modules
Underwriters Laboratories (UL)
uninstalling NICs
uninterruptible power supplies [See UPSs (uninterruptible power supplies).]
Unisys 2nd
universal racks
Unix
     commands reference (Wikipedia.org)
     processes, viewing
     Solaris secure support
     Solaris support
     troubleshooting
unknown unknowns (capacity planning)
upgrading
     applications
     BIOS
     firmware
     hardware drivers
     motherboards
     multiple processors
     NICs
     processors 2nd
     RAM (random access memory)
         higher-capacity modules
         upgrade options and strategies
     ROM BIOS
         CMOS RAM backups
         flash ROM recovery
         flash ROM upgrades
         obtaining updates
         prerequisites
         version information
     servers
         administration requirements
         software
     tape backups
     upgrade licenses
Upper Memory Area [See UMA (Upper Memory Area).]
UPSs (uninterruptible power supplies)
     2N topologies
     alerts, nontransmittal of
     APC UPS Selector
     batteries
         non-charging problems
         shutdown settings
     COM port conflicts
     common configurations
         multiple rack-mounted servers
         pedestal servers
         single rack-mounted servers
     delta conversion online systems
     documentation
     double conversion online systems
     double-conversion online
     dual-processor servers
     ferro-resonant
     hard-wired
     line-interactive 2nd
     Linux servers
     N topologies
     Network UPS Tools website
     new installations
     power circuits table
     power factor correction (PFC) 2nd
     product selector website
     ratings
         JCS Custom PCs power use calculator
         power use calculations
         VA (volt-amp)
         vendor buying guides
     selection specifications
         AC connectors
         batteries
         recommended features
         runtimes
         server capacity and purpose
         voltages
     server room requirements
     service shutdowns
     standby
         standby-ferro systems
         typical configuration of
         VA (volt-amp) ratings
     system restart problems
     UL 60601-1 medical electrical equipment
     vendors
         American Power Conversion models
         Eaton PowerWare models
         Liebert (Emerson Power Network) models
         MGE UPS models
         MinuteMan models
         OneAC models
         Tripp Lite models
USB (universal serial bus)
     bus bandwidth speeds
     connectors
         pinouts
         Series A
         Series B
     flash storage readers
     functions
     hubs
     PnP (Plug and Play)
     self-identifying peripherals
     speed
     support for
     troubleshooting
     USB 2.0
USB.org
user passwords
Using Storage Area Networks Special Edition
USR.com
utilities [See software; tools (networks).]
UXD.com