https://community.hpe.com/t5/disk-enclosures/performance-differences-m20-amp-m30/m-p/2557867#M2386 Model 30 (GALAXY)<BR /><BR />Host interface<BR />- Full-Speed Fibre Channel Arbitrated Loop<BR />- 100 MB/s (1 GB/s)<BR />- Short-Wave Optical Fibre Duplex SC - Connector<BR /><BR />Drive bus<BR />- 8-bit SCSI-2 10 MB/s (single ended); 5 buses<BR /><BR />Storage controller<BR />- Up to 64 MB of read/write cache per controller (minimum configuration is 5 disk modules, 1 storage controller, and 1 battery backup unit)<BR /><BR />*** High-performance, 7200-rpm, 4.1 GB, 8.8 GB, and 17.8 GB disk modules <BR />*** Dual active storage controllers afford dual 100 MB/s (1 GB/s) FC-AL links to single or multiple hosts <BR />*** Up to 128 MB user-allocated read/write cache optimizes RAID performance <BR />*** Hardware RAID implementation optimizes performance and minimizes host system overhead <BR /><BR />Model 20 (NIKE)<BR /><BR />Host Interface<BR />- 16-bit SCSI-220 MB/s (Wide and Differential)<BR /><BR />Drive Bus<BR />- 8-bit SCSI-210 MB/s (single-ended); 2 buses<BR /><BR />Storage Controller<BR />- Up to 64 MB of read/write cache (minimum configuration is 5 disk drives, 2 storage controllers, and 1 battery backup unit)<BR /><BR />Array Storage Capacity<BR />- Up to 20 drives with up to 84 GB (with 4.2 GB disks<BR /><BR />*** Dual-active storage controllers afford dual Fast/Wide SCSI links to a single host1 or multiple hosts <BR />*** High performance, 7200 RPM, 4.2 GB, 8.8 GB and 17.8 GB disk modules provide high speed access. <BR />*** Up to 64 MB user-allocated read/write cache (16 MB for Model 10) optimize the RAID 5 write performance <BR />*** Adaptive caching algorithms on the storage processor dynamically tune the caching parameters optimizing array performance to I/O patterns that may vary over time <BR />*** Hardware RAID implementation optimizes performance and minimizes host system overhead<BR /><BR />Hope this helps, Mon, 30 Jul 2001 08:51:13 GMT Insu Kim 2001-07-30T08:51:13Z https://community.hpe.com/t5/disk-enclosures/performance-differences-m20-amp-m30/m-p/2557866#M2385 we have two K class servers and wish to clone one for DR<BR /><BR />the main server has an M30 FC array conencted but the DR server has M20 SCSI array, both have snmae amount of disk space available<BR /><BR />what is the difference in performance between the M20 and M30 if both systems were set up the same apart from this item of hardware<BR /><BR />the company really doesnt want to spend money on another M30 and all the FC connections if it can be helped<BR /><BR />tahnsk<BR /><BR />Paul Gold<BR />CAST systems<BR /><BR /> Fri, 27 Jul 2001 08:15:50 GMT https://community.hpe.com/t5/disk-enclosures/performance-differences-m20-amp-m30/m-p/2557866#M2385 Paul Gold 2001-07-27T08:15:50Z https://community.hpe.com/t5/disk-enclosures/performance-differences-m20-amp-m30/m-p/2557867#M2386 Model 30 (GALAXY)<BR /><BR />Host interface<BR />- Full-Speed Fibre Channel Arbitrated Loop<BR />- 100 MB/s (1 GB/s)<BR />- Short-Wave Optical Fibre Duplex SC - Connector<BR /><BR />Drive bus<BR />- 8-bit SCSI-2 10 MB/s (single ended); 5 buses<BR /><BR />Storage controller<BR />- Up to 64 MB of read/write cache per controller (minimum configuration is 5 disk modules, 1 storage controller, and 1 battery backup unit)<BR /><BR />*** High-performance, 7200-rpm, 4.1 GB, 8.8 GB, and 17.8 GB disk modules <BR />*** Dual active storage controllers afford dual 100 MB/s (1 GB/s) FC-AL links to single or multiple hosts <BR />*** Up to 128 MB user-allocated read/write cache optimizes RAID performance <BR />*** Hardware RAID implementation optimizes performance and minimizes host system overhead <BR /><BR />Model 20 (NIKE)<BR /><BR />Host Interface<BR />- 16-bit SCSI-220 MB/s (Wide and Differential)<BR /><BR />Drive Bus<BR />- 8-bit SCSI-210 MB/s (single-ended); 2 buses<BR /><BR />Storage Controller<BR />- Up to 64 MB of read/write cache (minimum configuration is 5 disk drives, 2 storage controllers, and 1 battery backup unit)<BR /><BR />Array Storage Capacity<BR />- Up to 20 drives with up to 84 GB (with 4.2 GB disks<BR /><BR />*** Dual-active storage controllers afford dual Fast/Wide SCSI links to a single host1 or multiple hosts <BR />*** High performance, 7200 RPM, 4.2 GB, 8.8 GB and 17.8 GB disk modules provide high speed access. <BR />*** Up to 64 MB user-allocated read/write cache (16 MB for Model 10) optimize the RAID 5 write performance <BR />*** Adaptive caching algorithms on the storage processor dynamically tune the caching parameters optimizing array performance to I/O patterns that may vary over time <BR />*** Hardware RAID implementation optimizes performance and minimizes host system overhead<BR /><BR />Hope this helps, Mon, 30 Jul 2001 08:51:13 GMT https://community.hpe.com/t5/disk-enclosures/performance-differences-m20-amp-m30/m-p/2557867#M2386 Insu Kim 2001-07-30T08:51:13Z