Chapter 3. Legacy CLI Syntax Reference84 3ware 9000 Series Serial ATA Controller CLI GuideIn addition, 3ware also includes on the 3ware CD a utility namedtw_sched(1), which is a wrapper around tw_cli(1). Used in conjunction with atime-driven scheduler such as crond(1d), it provides background taskscheduling features such as rebuild, verify, and mediascan. For details abouttw_sched(1), see the manpages for it.Scheduling for the 7000 and 8000 series models can also be done using 3DM1.x. (Note that 3DM 2 only provides scheduling only for 9000 series models.)Alarms. The Alarms command allows you to display Asynchronous EventNotification (AEN) events that have been generated by controllers. AENevents have different levels of severity. They can be extracted and archivedfor overall trend analysis. For details, see “Alarms Commands” on page 109.CLI does not store alarms command in a log file, so when you reboot, alarmsin the previous session will be lost. To preserve the alarms through reboot,you can either extract the alarms from CLI and store them in a file, or install3DM 2, which does log alarm messages. For more information, see the 3ware9000 Series Serial ATA RAID Controller User Guide.Set. Setting commands can be used to modify and change controller and arraysettings. Settings that can be changed include: rebuild rate, verify rate, andturning on or off cache, autoverify, or overwriteECC. For details, see “SetCommands” on page 111.Help. Help commands. Options in this category allow you to display helpinformation on the other commands and options. For details, see “HelpCommands” on page 113.Throughout this chapter the examples reflect the interactive method ofexecuting 3ware CLI.ConventionsThe following conventions are used through this guide: In text, monospace font is used for code and for things you type. In commands, an italic font indicates items that you must specify, such asa controller ID, or a unit ID. In commands, brackets around an item indicates that it is optional. In commands, ellipses (. . .) indicate that more than one parameter can beincluded. In commands, a brace (|) indicates an 'or' situation where the user has achoice between more than one option, but only one can be specified.For example, in the maint command to rescan all ports and reconstitute allunits, the syntax appears as maint rescan [cid ...] [noscan]. The italiccid indicates that you need to supply a controller ID. The ellipses indicate thatyou can specify more than one controller ID, separated by spaces. The