Re: [Bacula-users] usb LTO4/5 tape
Phil Stracchino wrote: (Footnote: LTO technology is now planned to extend out to LTO8, with native uncompressed capacity of 12.8TB and transfer rate of 472MB/s. I'm wondering what the native capacity of the next generation LTOs will be, what with Oracle announcing 5Tb native capacity format in its Storagtek range in the last few weeks (http://www.theregister.co.uk/2011/01/31/oracke_t1_c/) and 10Tb coming real soon now - plus IBM talking about 35Tb soon. Perhaps LTO6,7 will be skipped. No word on what interface is going to be required to accomplish a sustained transfer rate of almost half a gigabyte per second. Direct PCI-Express connection...?) 8Gb/s FC will keep up, there are 10 and 20Gb/s interface standards too, SAS might struggle a bit though. ;) These kinds of speeds and capacities might well be utter overkill for backups but they fall perfectly into a need I have here for LTFS-style work. -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] usb LTO4/5 tape
Alessandro Bono schrieb: I need an LTO4 or LTO5 tape with usb interface, someone know a similar beast? I don't think there is something like this. LTO-4 needs a minimum speed of 40 MB/s, if it falls below that the drive starts shoe-shining which will damage the tapes and drive heads sooner or later. Maybe with USB3, but I doubt that. ralf -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] usb LTO4/5 tape
LTO-5 needs FC to communicate with the host so I doubt it will be in USB. Arunav. -Original Message- From: Ralf Gross [mailto:ralf-li...@ralfgross.de] Sent: Tuesday, February 08, 2011 4:06 PM To: bacula-users@lists.sourceforge.net Subject: Re: [Bacula-users] usb LTO4/5 tape Alessandro Bono schrieb: I need an LTO4 or LTO5 tape with usb interface, someone know a similar beast? I don't think there is something like this. LTO-4 needs a minimum speed of 40 MB/s, if it falls below that the drive starts shoe-shining which will damage the tapes and drive heads sooner or later. Maybe with USB3, but I doubt that. ralf -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] usb LTO4/5 tape
On Tue, 2011-02-08 at 16:16 +0100, Arunav Mandal wrote: LTO-5 needs FC to communicate with the host so I doubt it will be in USB. I don't think FC is required, HP at least has LTO5 with SAS interface http://h30094.www3.hp.com/product.asp?sku=10261446mfg_part=BL536Apagemode=ca Arunav. -Original Message- From: Ralf Gross [mailto:ralf-li...@ralfgross.de] Sent: Tuesday, February 08, 2011 4:06 PM To: bacula-users@lists.sourceforge.net Subject: Re: [Bacula-users] usb LTO4/5 tape Alessandro Bono schrieb: I need an LTO4 or LTO5 tape with usb interface, someone know a similar beast? I don't think there is something like this. LTO-4 needs a minimum speed of 40 MB/s, if it falls below that the drive starts shoe-shining which will damage the tapes and drive heads sooner or later. Maybe with USB3, but I doubt that. ralf -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users -- Cordiali Saluti Alessandro Bono -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] usb LTO4/5 tape
On Tue, 2011-02-08 at 16:06 +0100, Ralf Gross wrote: Alessandro Bono schrieb: I need an LTO4 or LTO5 tape with usb interface, someone know a similar beast? I don't think there is something like this. LTO-4 needs a minimum speed of 40 MB/s, if it falls below that the drive starts shoe-shining which will damage the tapes and drive heads sooner or later. I need only for disaster recovery so for this situation performance is not so important, but I understand this performance level is required by tecnologie Maybe with USB3, but I doubt that. ralf -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users -- Cordiali Saluti Alessandro Bono -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] usb LTO4/5 tape
On 02/08/11 09:20, Alessandro Bono wrote: Hi all I need an LTO4 or LTO5 tape with usb interface, someone know a similar beast? So what you've got to ask yourself is, do you feel lucky? Well, do ya ... punk? Full speed USB 1.1 is 12 Mbit/s (roughly 1.44 MB/s). High speed USB 2.0 can theoretically hit 480 Mbit/s (roughly 57 MB/s). An LTO1 drive can transfer data at 20 MB/s, LTO2 40MB/s, LTO3 80 MB/s. Do the math. Even a maximum speed USB2.0 connection won't keep an LTO3 drive streaming, let alone an LTO4 or LTO5. (Footnote: LTO technology is now planned to extend out to LTO8, with native uncompressed capacity of 12.8TB and transfer rate of 472MB/s. No word on what interface is going to be required to accomplish a sustained transfer rate of almost half a gigabyte per second. Direct PCI-Express connection...?) -- Phil Stracchino, CDK#2 DoD#299792458 ICBM: 43.5607, -71.355 ala...@caerllewys.net ala...@metrocast.net p...@co.ordinate.org Renaissance Man, Unix ronin, Perl hacker, Free Stater It's not the years, it's the mileage. -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] usb LTO4/5 tape
On 02/08/11 10:51, Alessandro Bono wrote: I need only for disaster recovery so for this situation performance is not so important, but I understand this performance level is required by tecnologie Could you use eSATA? -- Phil Stracchino, CDK#2 DoD#299792458 ICBM: 43.5607, -71.355 ala...@caerllewys.net ala...@metrocast.net p...@co.ordinate.org Renaissance Man, Unix ronin, Perl hacker, Free Stater It's not the years, it's the mileage. -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] usb LTO4/5 tape
Hello, Le mardi 08 février 2011 17:06:22, Phil Stracchino a écrit : On 02/08/11 09:20, Alessandro Bono wrote: Hi all I need an LTO4 or LTO5 tape with usb interface, someone know a similar beast? So what you've got to ask yourself is, do you feel lucky? Well, do ya ... punk? Full speed USB 1.1 is 12 Mbit/s (roughly 1.44 MB/s). High speed USB 2.0 can theoretically hit 480 Mbit/s (roughly 57 MB/s). An LTO1 drive can transfer data at 20 MB/s, LTO2 40MB/s, LTO3 80 MB/s. Do the math. Even a maximum speed USB2.0 connection won't keep an LTO3 drive streaming, let alone an LTO4 or LTO5. USB 3.0 is available and is about 4.8Gbit/s (600 MB/s)... :-) http://hothardware.com/News/USB-30-and-SATA-6G-Performance-Preview/ Bye -- Need professional help and support for Bacula ? Visit http://www.baculasystems.com -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] usb LTO4/5 tape
On 02/08/11 11:19, Eric Bollengier wrote: USB 3.0 is available and is about 4.8Gbit/s (600 MB/s)... :-) http://hothardware.com/News/USB-30-and-SATA-6G-Performance-Preview/ For very limited, bleeding-edge values of available. ;) -- Phil Stracchino, CDK#2 DoD#299792458 ICBM: 43.5607, -71.355 ala...@caerllewys.net ala...@metrocast.net p...@co.ordinate.org Renaissance Man, Unix ronin, Perl hacker, Free Stater It's not the years, it's the mileage. -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] usb LTO4/5 tape
On 2/8/2011 12:56 PM, Phil Stracchino wrote: On 02/08/11 11:19, Eric Bollengier wrote: USB 3.0 is available and is about 4.8Gbit/s (600 MB/s)... :-) http://hothardware.com/News/USB-30-and-SATA-6G-Performance-Preview/ For very limited, bleeding-edge values of available. ;) Yes, but it will be the de facto standard USB connection long before we see LTO8 drives. -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
