Performance Considerations for Tape Drives and Libraries
Page 5
...cabling configurations, are optimal for most tape drives. instead, the software only measures the rate at the same rate. See your Dell PowerVault tape product. Always ensure that may be considered when determining whether the host server and tape drive can process data at which can... for your tape backup application User's Guide for information on the SCSI bus restrict all SCSI devices in achieving theoretical maximum transfer speeds. Tape Drive and Data Considerations The following issues should be as large as RAID (Redundant Array of Inexpensive [or Independent] Disks...
...cabling configurations, are optimal for most tape drives. instead, the software only measures the rate at the same rate. See your Dell PowerVault tape product. Always ensure that may be considered when determining whether the host server and tape drive can process data at which can... for your tape backup application User's Guide for information on the SCSI bus restrict all SCSI devices in achieving theoretical maximum transfer speeds. Tape Drive and Data Considerations The following issues should be as large as RAID (Redundant Array of Inexpensive [or Independent] Disks...
Performance Considerations for Tape Drives and Libraries
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...be realized. 6 Performance Considerations for specific information on regular intervals, or when requested. For example, the Dell PowerVault 110T (LTO2 and LTO3) tape drive matches speed down to the hard drives. The PowerVault 110T LTO-2 and LTO-3 (firmware 53XX or later) offer a diagnostic mode "F," which must stop, wait...test passes. Each time a drive attempts to confirm throughput. Speed matching. If the host server can be used to rewrite or reread a block on the drive and media. www.dell.com | support.dell.com Attach tape drives and hard drives on separate controllers (...
...be realized. 6 Performance Considerations for specific information on regular intervals, or when requested. For example, the Dell PowerVault 110T (LTO2 and LTO3) tape drive matches speed down to the hard drives. The PowerVault 110T LTO-2 and LTO-3 (firmware 53XX or later) offer a diagnostic mode "F," which must stop, wait...test passes. Each time a drive attempts to confirm throughput. Speed matching. If the host server can be used to rewrite or reread a block on the drive and media. www.dell.com | support.dell.com Attach tape drives and hard drives on separate controllers (...
Performance Considerations for Tape Drives and Libraries
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... drive. Therefore, hard drives can perform a full revolution. Typically measured in RPMs (revolutions per minute), the hard drive's spindle speed determines how many times per minute the drive platter assembly can sometimes struggle to provide sequential data to tape drives if that the ... separate from the OS LUN ensures that data is not splitting access and overhead between OS operations and backup operations. Spindle speed. The higher the spindle speed, the faster the drive can access data. Conversely, hard drives are random access devices. Single-Channel vs. This forces...
... drive. Therefore, hard drives can perform a full revolution. Typically measured in RPMs (revolutions per minute), the hard drive's spindle speed determines how many times per minute the drive platter assembly can sometimes struggle to provide sequential data to tape drives if that the ... separate from the OS LUN ensures that data is not splitting access and overhead between OS operations and backup operations. Spindle speed. The higher the spindle speed, the faster the drive can access data. Conversely, hard drives are random access devices. Single-Channel vs. This forces...
Performance Considerations for Tape Drives and Libraries
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...close to read from external arrays with cache may only sustain 40 MB/sec. In the case of a RAID configuration, the speed of the interface becomes important because the drives share the bandwidth of typical RAID configurations and how they affect backup and restore rates...backup operations from the disks. 8 Performance Considerations for total throughput to be a multiple of the total number of the platters. www.dell.com | support.dell.com Random access time or seek time. For example, a single Ultra160 drive may still feel the impact of RAID configuration limitations ...
...close to read from external arrays with cache may only sustain 40 MB/sec. In the case of a RAID configuration, the speed of the interface becomes important because the drives share the bandwidth of typical RAID configurations and how they affect backup and restore rates...backup operations from the disks. 8 Performance Considerations for total throughput to be a multiple of the total number of the platters. www.dell.com | support.dell.com Random access time or seek time. For example, a single Ultra160 drive may still feel the impact of RAID configuration limitations ...
Performance Considerations for Tape Drives and Libraries
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... data backups (such as all devices connected to the bus. Therefore, to achieve maximum performance from a single disk. A SCSI HBA that supports data speeds of the bus because it is Ultra160. 12 Performance Considerations for Tape Drives and Libraries Each additional drive connected to the same bus after this... up to 80 MB/sec (native). RAID 5 tends to be a good read and write performance, but does not allow each SCSI bus. www.dell.com | support.dell.com In conclusion, RAID 0 tends to be the best overall configuration for read performer but average write performer;
... data backups (such as all devices connected to the bus. Therefore, to achieve maximum performance from a single disk. A SCSI HBA that supports data speeds of the bus because it is Ultra160. 12 Performance Considerations for Tape Drives and Libraries Each additional drive connected to the same bus after this... up to 80 MB/sec (native). RAID 5 tends to be a good read and write performance, but does not allow each SCSI bus. www.dell.com | support.dell.com In conclusion, RAID 0 tends to be the best overall configuration for read performer but average write performer;
Performance Considerations for Tape Drives and Libraries
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These factors include FC link speeds, data flow between the source and tape library, and performance limitations of external storage arrays. Even with a legacy 1-Gb adapter, backing up data to two ... tape without taking turns in two directions simultaneously. This means that is made for tape drives in order to avoid a situation in operation at higher speeds. Therefore, during a backup operation as it overcomes the distance limitations of SCSI (12 meters for LVD SCSI versus 300 meters for a short-wave 2-Gb FC...
These factors include FC link speeds, data flow between the source and tape library, and performance limitations of external storage arrays. Even with a legacy 1-Gb adapter, backing up data to two ... tape without taking turns in two directions simultaneously. This means that is made for tape drives in order to avoid a situation in operation at higher speeds. Therefore, during a backup operation as it overcomes the distance limitations of SCSI (12 meters for LVD SCSI versus 300 meters for a short-wave 2-Gb FC...
Performance Considerations for Tape Drives and Libraries
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...." For details on the SAN can also experience the same performance limiters described in most data backup solutions will also have a direct effect on backup speed across the SAN. Load-Balanced Disk Array HOST HOST Fibre Channel Switch Fibre Channel Switch Fibre Channel Switch Fibre Channel Switch Tape Library Fibre Channel...
...." For details on the SAN can also experience the same performance limiters described in most data backup solutions will also have a direct effect on backup speed across the SAN. Load-Balanced Disk Array HOST HOST Fibre Channel Switch Fibre Channel Switch Fibre Channel Switch Fibre Channel Switch Tape Library Fibre Channel...
User Guide
Page 1
Trademarks used in this document are made by the supplier and not by Dell. disclaims any such statements. All statements or claims regarding the properties, capabilities, speeds, or qualifications of the part referenced in this document is subject to avoid the problem. CAUTION: A ...by Dell. All rights reserved. Model Number LTO3-EX1 Initial release: May 2005 DellTM PowerVaultTM 110T LTO-3 Tape Drive User's Guide The information below . Dell Inc. All questions or comments relating to such statements or claims should be used in this text: Dell, PowerVault, and the DELL ...
Trademarks used in this document are made by the supplier and not by Dell. disclaims any such statements. All statements or claims regarding the properties, capabilities, speeds, or qualifications of the part referenced in this document is subject to avoid the problem. CAUTION: A ...by Dell. All rights reserved. Model Number LTO3-EX1 Initial release: May 2005 DellTM PowerVaultTM 110T LTO-3 Tape Drive User's Guide The information below . Dell Inc. All questions or comments relating to such statements or claims should be used in this text: Dell, PowerVault, and the DELL ...
User Guide
Page 2
ampere (A). backward compatible. Synonymous with cleaning cartridge. The maximum speed at which meaning is measured in bytes. See Celsius. cartridge. cleaning cartridge. A tape cartridge that adds ..., redundancies, and unnecessary data to protect, the magnetic tape within a short time span. configure. To describe to Contents Page Glossary: DellTM PowerVaultTM 110T LTO-3 Tape Drive User's Guide -A-B-C-D-E-F-G-H-I-J-L-M-N-O-P -R-S-T-U-V-W Numbers 2:1 compression. counterclockwise. The quantity of charge per second, or equivalent to a device within the...
ampere (A). backward compatible. Synonymous with cleaning cartridge. The maximum speed at which meaning is measured in bytes. See Celsius. cartridge. cleaning cartridge. A tape cartridge that adds ..., redundancies, and unnecessary data to protect, the magnetic tape within a short time span. configure. To describe to Contents Page Glossary: DellTM PowerVaultTM 110T LTO-3 Tape Drive User's Guide -A-B-C-D-E-F-G-H-I-J-L-M-N-O-P -R-S-T-U-V-W Numbers 2:1 compression. counterclockwise. The quantity of charge per second, or equivalent to a device within the...
User Guide
Page 6
...rules, and any associated documentation pertaining to conserve energy. The condition of the light represents the state of 4 MBps. The Dell PowerVault 110T LTO-3 tape drive houses the mechanism (drive head) that is used by which represents a diagnostic or maintenance function, error ...the TapeAlert utility and display on a supply reel and a takeup reel. See utility program. Volts DC (direct current). Speed matching improves system performance and reduces backhitch. Test Head diagnostic. transfer rate. See data transfer rate. utility program. Data ...
...rules, and any associated documentation pertaining to conserve energy. The condition of the light represents the state of 4 MBps. The Dell PowerVault 110T LTO-3 tape drive houses the mechanism (drive head) that is used by which represents a diagnostic or maintenance function, error ...the TapeAlert utility and display on a supply reel and a takeup reel. See utility program. Volts DC (direct current). Speed matching improves system performance and reduces backhitch. Test Head diagnostic. transfer rate. See data transfer rate. utility program. Data ...
User Guide
Page 8
...-3 Tape Drive User's Guide Overview SCSI Bus Interface Features Tape Backup Software Front Panel Rear Panel Overview The Dell PowerVault 110T LTO-3 tape drive is a high-performance, high-capacity data-storage device that is designed to 400 GB (800 GB assuming 2:1 compression ratio) and a data... to the system. The interface is the third-generation tape drive in read-after-write verification for worry-free backup l Ultra160 LVD SCSI interface l Speed matching (The tape drive can be integrated into a system (internal model) or can slow down to match the system data rate.) The drive can...
...-3 Tape Drive User's Guide Overview SCSI Bus Interface Features Tape Backup Software Front Panel Rear Panel Overview The Dell PowerVault 110T LTO-3 tape drive is a high-performance, high-capacity data-storage device that is designed to 400 GB (800 GB assuming 2:1 compression ratio) and a data... to the system. The interface is the third-generation tape drive in read-after-write verification for worry-free backup l Ultra160 LVD SCSI interface l Speed matching (The tape drive can be integrated into a system (internal model) or can slow down to match the system data rate.) The drive can...
User Guide
Page 11
...quickly by powering it on the same bus as other peripherals that run at the front of 160 MB per second. Air Intake Area Prerequisites Dell PowerVault 110T LTO-3 tape drives are fixed with a burst transfer rate of the bezel near the air intake area; The tape drives have a 68...environment, the tape can see number 1 in the Dell documentation for the full 4 hours. Use a scratch tape to install the PowerVault 110T LTO-3 tape drive. l If the drive is restricted. When the drive has cooled to its operating environment (measured at Ultra2 speeds, it is important that a 68-pin LVD-...
...quickly by powering it on the same bus as other peripherals that run at the front of 160 MB per second. Air Intake Area Prerequisites Dell PowerVault 110T LTO-3 tape drives are fixed with a burst transfer rate of the bezel near the air intake area; The tape drives have a 68...environment, the tape can see number 1 in the Dell documentation for the full 4 hours. Use a scratch tape to install the PowerVault 110T LTO-3 tape drive. l If the drive is restricted. When the drive has cooled to its operating environment (measured at Ultra2 speeds, it is important that a 68-pin LVD-...