182Chapter K - GDT User's ManualK. The Diagnosis Program GDTMONGDTMON (GDT monitor) is a helpful and flexible diagnosis tool for the monitoring, mai n-tenance and tuning of mass storage subsystems which are based on one or more GDT co n-trollers. The key features of GDTMON:9 Diagnosis program with a graphical user interface. Clear performance representationwith variable horizontal bars9 Available under MS-DOS, Netware 3.x & 4.x, Windows 95, Windows NT, OS/2 andSCO UNIX9 Loadable locally (on the server) or remotely from an authorized workstation (NCPEamd NETBIOS protocol support)9 Indicates the performance, expressed in [KB/sec] and [IO/sec], of:- Host Drives (Disk, Chain, RAID 0, 1, 4, 5, 10)- Cache Drives- SCSI Drives9 Indicates the GDT cache utilization- Read-Hits- Write-Hits- Separate indication for data- and parity-cache (RAID 4/5 )9 Allows on-line changing of the GDT cache parameters:- Cache ON/OFF- Delayed Write ON/OFF9 Allows on-line changing of the SCSI devicesí parameters:- SCSI protocol- Synchronous or Asynchronous data transfer- Setting of the synchronous data transfer rate- Disconnect/Reconnect- Disk Cache ON/OFF- Tagged Queues ON/OFF9 Indicates the structure of Cache and Host Drives9 Performs on-line parity checking of RAID 4 and RAID 5 Host Drives9 Saves all relevant configuration data to floppy disk or hard disk9 Sets up or removes RAID 1 Disk Arrays while maintaining full operational cond itions9 Performs Hot-Plugs on RAID 4 / RAID 5 disk arrays9 Allows to add or remove a dedicated or pool hot-fix drive while maintaining full o p-erational conditions
