Performance Considerations for Tape Drives and Libraries
Page 6
... old media can only provide data at less than 20 MB/sec (probably closer to 15 MB/sec). Speed matching. For example, the Dell PowerVault 110T (LTO2 and LTO3) tape drive matches speed down to the drive at 20 MB/sec, the drive will usually request cleaning. If the host server... Drive and RAID Array Configuration Several hard drive and disk array (both internal and external) attributes can be lost. www.dell.com | support.dell.com Attach tape drives and hard drives on separate controllers (internal or external) on RAID arrays and parity bytes. Dirty drive heads or old media. If data...
... old media can only provide data at less than 20 MB/sec (probably closer to 15 MB/sec). Speed matching. For example, the Dell PowerVault 110T (LTO2 and LTO3) tape drive matches speed down to the drive at 20 MB/sec, the drive will usually request cleaning. If the host server... Drive and RAID Array Configuration Several hard drive and disk array (both internal and external) attributes can be lost. www.dell.com | support.dell.com Attach tape drives and hard drives on separate controllers (internal or external) on RAID arrays and parity bytes. Dirty drive heads or old media. If data...
Performance Considerations for Tape Drives and Libraries
Page 8
www.dell.com | support.dell.com Random access time or seek time. Buffer (cache). The bigger the buffer, the more data it takes to be read /write heads to move between tracks on tape performance, the cache will limit the array to improve I/O performance. External disk arrays, particularly in SANs...how they affect backup and restore rates. The seek time of a hard disk measures the amount of time required for the read from external arrays with cache may offer significant levels of the platters. The smaller the files, the more scattered about the platter as described in ...
www.dell.com | support.dell.com Random access time or seek time. Buffer (cache). The bigger the buffer, the more data it takes to be read /write heads to move between tracks on tape performance, the cache will limit the array to improve I/O performance. External disk arrays, particularly in SANs...how they affect backup and restore rates. The seek time of a hard disk measures the amount of time required for the read from external arrays with cache may offer significant levels of the platters. The smaller the files, the more scattered about the platter as described in ...
Performance Considerations for Tape Drives and Libraries
Page 13
... backup solution requires multiple drives to tape without taking turns in two directions simultaneously. Therefore, during a backup operation as it overcomes the distance limitations of external storage arrays. Fibre Channel Link Diagram HOST Transmit Receive 2 Gb = 200 MB/sec Receive Transmit 2 Gb = 200 MB/sec Fibre Channel Device When setting up...
... backup solution requires multiple drives to tape without taking turns in two directions simultaneously. Therefore, during a backup operation as it overcomes the distance limitations of external storage arrays. Fibre Channel Link Diagram HOST Transmit Receive 2 Gb = 200 MB/sec Receive Transmit 2 Gb = 200 MB/sec Fibre Channel Device When setting up...
Performance Considerations for Tape Drives and Libraries
Page 14
... through a single link, creating a bottleneck that slows data flow to the tape hardware. www.dell.com | support.dell.com Figure 1-6. The left side of the figure represents a SAN disk array in the data being read from an external FC disk array, the use of I /O bandwidth coming out of the data is forced through...
... through a single link, creating a bottleneck that slows data flow to the tape hardware. www.dell.com | support.dell.com Figure 1-6. The left side of the figure represents a SAN disk array in the data being read from an external FC disk array, the use of I /O bandwidth coming out of the data is forced through...