Sun Microsystems 96257 manual C-96, Sun Confidential Internal Only, Revision A

relative humidity. The amount of moisture in the air, as compared with the maximum amount of humidity that the air could contain at the same temperature; expressed as a percentage.

relocation. The process of physically moving VTSS units within a same site or immediate area without the use of packing materials. Contrast with deinstallation.

remote customer service engineer (RCSE). A Global Services RRC person who receives customer and CSE calls, performs preliminary diagnostic tasks, evaluates failure situations, and dispatches CSEs to customer sites for repairs and maintenance.

remote diagnostics. See Service Delivery Platform. remote maintenance. See Service Delivery Platform.

Remote Resolution Center (RRC). A Sun StorageTek Global Services group that is available 24 x 7 x 365 to handle customer requests for service and to provide technical support and remote problem resolution. Com- prised of Tier 1, Tier 2, Tier 3 (subject-matter experts), critical-situation (CRITSIT) management, and out-of-cy- cle or performance management organizations.

resistance. (1) The property of an electrical conductor that specifies the ability of an electrical current to flow through it, using ohms (Ω) as the unit of measurement.

(2)The parameter describing the current-limiting proper- ty of an object. (3) The ratio between potential difference applied across an object, and the resulting current through the object.

RRC. See Remote Resolution Center.

RTD. See real tape drive.

S

SAN. Storage area network. A storage networking con- figuration that optimizes communications between vari- ous hosts, applications, and disk or tape storage sys- tems.

SAP. Systems Applications and Products.

scalability. An ability to easily change in size or configu- ration to suit changing conditions.

SCSI. Small Computer System Interface. A high-speed interface that can connect to computer devices (hard drives, CD-ROM drives, tape drives, scanners, printers, etc.). SCSI can connect up to seven devices; each one is given an identification number from zero (0) to seven (7), which is set with a manual switch. Newer versions of SC- SI can connect up to 15 devices.The SCSI cable trans- fers eight bits at a time, in parallel.

SDP. See Service Delivery Platform.

SE. See systems engineer.

serial. One at a time. A serial interface transmits one bit of data at a time over one line. Contrast with parallel.

serial access. A method of storing and retrieving infor- mation in sequence, as on magnetic tape media. To ac- cess file or piece of information, magnetic tape must be wound or unwound to the point where the data is stored. Contrast with random access.

server. Computer hardware and software that is at- tached to a network and which automatically stores, pro- cesses, and transmits data or information that is general- ly accessed by many people using client programs. See also client/server.

Service Delivery Platform (SDP). A Sun StorageTek

maintenance and reporting system that allows field ma- chines to connect, via LAN/Ethernet over the Internet, or via modem over a telephone line, to a call-handling ma- chine at the RRC. SDP automatically notifies the RRC of machine failures, trends, and status, and whether a ma- chine is inoperable, degraded, subject to potential fail- ure, or ready to offload event data. SDP also allows re- mote personnel to perform maintenance and diagnostic tasks on a linked machine, thereby reducing on-site ser- vice requirements.

severity code. A code that classifies the seriousness of an error condition.

SFL. Suspect FRU list.

SFP. Small form-factor packaged. A small-form connec- tor type.

Siebel. A software tool used by Sun StorageTek that standardizes and automates certain tasks in the sales and ordering process, and which tracks customer orders in a centralized database.

SIM. Service Information Message. In VSM, a message generated by a host system console after it has received sense information from a VTSS indicating a need for ser- vice, repair, or customer action, or for the purpose of communicating status information.

simplex. Unidirectional; a single-fiber or single-element cable that provides one-way data transmission. Contrast with duplex.

slot. Part of the physical location designator for each FRU in a unit. See unit.tray.slot.

SMS. System-Managed Storage. SN. Serial number.

SNMP. Simple Network Management Protocol. The In- ternet standard protocol for network management soft- ware. Using SNMP, programs called agents monitor de- vices on a network (hubs, routers, bridges, etc.). Another program collects the data from the monitoring operations into a database called a management information base (MIB). This data is used to check if all devices on the net- work are operating properly.

Solaris. A UNIX-based operating system and window system for Sun SPARC computers, formerly called Sun- OS. It includes Open Look and Motif GUIs, OpenWin- dows (the Sun version of X Windows), DOS and Win- dows emulation, and ONC networking, and is often used for server operating systems.

spare. A VTSS device physically located in the VTSS but not logically associated with an array. Spares are used to automatically reconstruct and logically replace failed devices.

spares partition. A partition state for extra (spare) VTSS disk array devices that are not used to store user data, nor included in a redundancy group, but that are avail- able for automatic reconstruction of failed devices in re- dundancy groups. Contrast with media acceptance test partition, production partition, unavailable partition.

SSA. Serial Storage Architecture. SSID. Subsystem identifier.

storage cluster. A VTSS functional partition that exists on a cluster motherboard, comprised of a multipath stor- age director, shared memory, and a support facility.

storage path. Also called a control region. Hardware within a controller that transfers data between the chan- nels and disk storage devices. See multipath storage di- rector.

C-96	Sun Confidential: Internal Only	96257
	Revision A