User manual HP STORAGEWORKS 2300 DISK SYSTEM

[. . . ] user's guide hp StorageWorks disk system 2300 Edition E0902 Notice © Hewlett-Packard Company, 2002. A6490-96014 Hewlett-Packard Company makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material. This document contains proprietary information, which is protected by copyright. [. . . ] Configuration SES is required for HP-UX . Switch 2 1. Bus ResetHot Swap Disk Reasons to Set OFF (|) Automatic bus reset reduces the chances of data corruption and saves the 30 to 60 seconds that the host would spend determining that a disk is unavailable. Bus reset signals the host to resend outstanding I/O requests. SCSI bus is held in reset as power goes down, thus avoiding data corruption Automatic SCSI bus reset reduces the chance of data corruption when a BCC is inserted or removed from the disk system. Reasons to Set ON (0) a. No bus reset reserves bus control to the host. No bus reset avoids resetting the entire bus for one disk. 2. Bus ResetHot Swap BCC Bus control is restricted to the host. No bus reset reserves bus control to the host. No bus reset avoids resetting the entire bus for one disk. Configuration 87 Disk Addressing Each disk in the StorageWorks Disk System 2300 occupies a separate address (SCSI ID) on the SCSI bus. Disk addresses range from 0 to 6 and 8 to 14 in fullbus mode (DIP switch 1 set to "|"). In split bus mode (DIP switch 1 set to "0"), the left BCC (viewing the disk system from the rear) is on the high numbered bank (with disk slots 8, 9, 10, 11, 12, 13, and 14) and the right BCC is on the low numbered bank (with disk slots 0, 1, 2, 3, 4, 5, and 6) of disk slots. Address 7 is reserved for host bust adapter(s). Table 10 shows all target SCSI IDs for full bus and split bus modes. Physical Disk Slot 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Right BCC Left BCC B Disk and BCC SCSI Addresses for Full and Split Bus Modes SCSI ID Full Bus 0 1 2 3 4 5 6 8 9 10 11 12 13 14 15 See Note Split Bus (Right BCC) 0 1 2 3 4 5 6 Split Bus (Left BCC) 8 9 10 11 12 13 14 15 15 88 Configuration Note In split bus mode, the enclosure monitor circuitry on each BCC utilizes SCSI address 15. This is allowable since each BCC is connected to a separate SCSI bus. However, when the enclosure configuration is in Full Bus mode, and the separate SCSI busses on the midplane are connected together and there are two BCCs in the enclosure, the secondary BCC does not connect to the SCSI bus. Disk Slots and Addressing The disk system has 14 available disk slots, SCSI addressing does not follow a "1-to-1" relationship between slot positions and SCSI addresses. Slot assignments and SCSI addresses are shown in Figure 49. Configuration In full bus mode, the SCSI address 7 is reserved for the host bus adapter. If more than one host bus adapter connects the disk system to other hosts, then a disk module must be removed from the slot whose SCSI address corresponds to the SCSI address of the additional host bus adapter. The most host bus adapters supported on this disk system is two. In split bus mode, the loading sequence is from slot 1 to the right to slot 7 and from slot 8 to the right to slot 14. In full bus mode, begin loading the disk modules in slot 1 and continue installing disk modules toward the right. Configuration 89 Setting Up the Hardware Event Monitor Separate monitors watch over the disks and the disk system. You need to install and configure the Disk Monitor (disk_em) and the High Availability Storage System Monitor (dm_ses_enclosure) for complete event notification. [. . . ] Hewlett-Packard maintains an active program of auditing production products to make sure these specifications remain true when products are retested under the same conditions. However, the limits of these specifications do not represent the optimum for long, trouble-free operation and specifically are not recommended for maximum satisfaction. The recommended conditions are stated when appropriate. Operating temperature: 5º C to 38º C (41º F to 100º F) Recommended: 20º C to 25. 5º C (68º F to 78º F) Storage temperature: -40º C to 70º C (-40º F to 158º F) Maximum gradient: 20º C per hour (36º F per hour) Relative humidity:10% to 80% noncondensing, max. wetbulb at 28º C Recommended:30% to 50% noncondensing Altitude:3000 m (10, 000 ft. ) Note For continuous, trouble-free operation, the disk system should NOT be operated at its maximum environmental limits for extended periods of time. [. . . ]