Optimizing Dell SCSI Solutions
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... servers that require a balance between storage capacity and performance. • RAID 0 - In this configuration is not recommended, it can be part of a group of redundancy and data protection Note: While this situation, availability and redundancy is the highest concern. PAGE 9 11/17/2005... A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 • RAID 5 - This solution is not recommended due to lack of web servers that require maximum...
... servers that require a balance between storage capacity and performance. • RAID 0 - In this configuration is not recommended, it can be part of a group of redundancy and data protection Note: While this situation, availability and redundancy is the highest concern. PAGE 9 11/17/2005... A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 • RAID 5 - This solution is not recommended due to lack of web servers that require maximum...
Optimizing Dell SCSI Solutions
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... servers that require better performance and are systems that generally require a balance between storage capacity and performance. A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 that can be part of a group of systems that work together to provide content. • Table 2-15 Database General IO profile I/O Profile I/O Profile (Read/Write...
... servers that require better performance and are systems that generally require a balance between storage capacity and performance. A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 that can be part of a group of systems that work together to provide content. • Table 2-15 Database General IO profile I/O Profile I/O Profile (Read/Write...
Optimizing Dell SCSI Solutions
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A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 4. SES provides a unique set of operation providing access to all 14 hard drives on the Split Bus Module (SBM) sets ... from the enclosure to monitor critical environmental variables such as shown in more detail below. If operating with two EMM modules, which are an integral part of secondary EMM. The configuration will be attached to SCSI bus address contention. Each of these topologies will not take effect until the enclosure is...
A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 4. SES provides a unique set of operation providing access to all 14 hard drives on the Split Bus Module (SBM) sets ... from the enclosure to monitor critical environmental variables such as shown in more detail below. If operating with two EMM modules, which are an integral part of secondary EMM. The configuration will be attached to SCSI bus address contention. Each of these topologies will not take effect until the enclosure is...
Optimizing Dell SCSI Solutions
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...RAID: Hardware Vs Software A RAID system mostly provides a fail-safe with Software RAID when compared to U160 speeds. either as part of SCSI subsystem to Hardware RAID implementations. Thus, host systems which perform heavy data processing and are impacted by: • Controller...group of these above factors is termed a software RAID. including a dedicated RAID processor and memory system - A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 5. Internal and External channels o Spanning across channels/controllers/PV22xS • Capacity Needs - RAID, when...
...RAID: Hardware Vs Software A RAID system mostly provides a fail-safe with Software RAID when compared to U160 speeds. either as part of SCSI subsystem to Hardware RAID implementations. Thus, host systems which perform heavy data processing and are impacted by: • Controller...group of these above factors is termed a software RAID. including a dedicated RAID processor and memory system - A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 5. Internal and External channels o Spanning across channels/controllers/PV22xS • Capacity Needs - RAID, when...
Optimizing Dell SCSI Solutions
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... up: see "Write Cache policy considerations" section above. • Global hot spare o A global hot spare can be in an array. o Dell recommends using dedicated hot spares for critical data. • Consistency checks o Consistency checks verify the correctness of redundant data in a different enclosure than ...back), but it is slower, since the controller must wait for the hard drive to return a good status on the same controller as part of regular system maintenance for critical data. Can impact performance if rebuilt array spans enclosures/channels. • Dedicated hot spare o A ...
... up: see "Write Cache policy considerations" section above. • Global hot spare o A global hot spare can be in an array. o Dell recommends using dedicated hot spares for critical data. • Consistency checks o Consistency checks verify the correctness of redundant data in a different enclosure than ...back), but it is slower, since the controller must wait for the hard drive to return a good status on the same controller as part of regular system maintenance for critical data. Can impact performance if rebuilt array spans enclosures/channels. • Dedicated hot spare o A ...
Optimizing Dell SCSI Solutions
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... not recommended to mix drives, since overall SCSI bus performance will be of HDD technology is not avoidable, it is designed to run so as part of the same spindle speed (RPM - By default the run modes: Manual and Automatic. Clustering is recommended that all hard drives in the mix... to Appendix A - o Highly recommended as to mix a combination of hard drives compliant with U320, U160 or Ultra-2 generation of array. A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 For more details on the hard PAGE 33 11/17/2005 o Patrol Read has two run mode is set from...
... not recommended to mix drives, since overall SCSI bus performance will be of HDD technology is not avoidable, it is designed to run so as part of the same spindle speed (RPM - By default the run modes: Manual and Automatic. Clustering is recommended that all hard drives in the mix... to Appendix A - o Highly recommended as to mix a combination of hard drives compliant with U320, U160 or Ultra-2 generation of array. A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 For more details on the hard PAGE 33 11/17/2005 o Patrol Read has two run mode is set from...
Optimizing Dell SCSI Solutions
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Controller Families and Features: Part 2 PERC 4/SC SCSI Technology Host Bus Interface Wide Ultra320 64-bit / 66 MHz PCI 2.2 (HBA) # Channels 1 # internal connectors # External Connectors RAID Levels Supported Cluster Support? A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 Table 5-2 - Cache Size (DIMM) Write Cache Options Read Cache Options BBU Battery Life...
Controller Families and Features: Part 2 PERC 4/SC SCSI Technology Host Bus Interface Wide Ultra320 64-bit / 66 MHz PCI 2.2 (HBA) # Channels 1 # internal connectors # External Connectors RAID Levels Supported Cluster Support? A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 Table 5-2 - Cache Size (DIMM) Write Cache Options Read Cache Options BBU Battery Life...
Optimizing Dell SCSI Solutions
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A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 Table 5-2 - Cache Size Write Cache Options Read Cache Options BBU Battery Life Max # Logical Drives/Controller Max # Physical Drives/Logical ...-pin HD (LVD); 1x 50-pin Ultra 2 x 68-pin UHD (LVD) n/a no n/a n/a n/a n/a n/a n/a Adaptec Adaptec 7899 n/a (nonRAID) PAGE 38 11/17/2005 Controller Families and Features: Part 3 SCSI Technology Host Bus Interface # Channels # internal connectors # External Connectors RAID Levels Supported Cluster Support?
A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 Table 5-2 - Cache Size Write Cache Options Read Cache Options BBU Battery Life Max # Logical Drives/Controller Max # Physical Drives/Logical ...-pin HD (LVD); 1x 50-pin Ultra 2 x 68-pin UHD (LVD) n/a no n/a n/a n/a n/a n/a n/a Adaptec Adaptec 7899 n/a (nonRAID) PAGE 38 11/17/2005 Controller Families and Features: Part 3 SCSI Technology Host Bus Interface # Channels # internal connectors # External Connectors RAID Levels Supported Cluster Support?