Re: LTO drives
* Joshua Baker-LePain <[EMAIL PROTECTED]> [20081107 15:12]: > On Fri, 7 Nov 2008 at 10:51am, Nick Brockner wrote > > >LTO4 does not shoe-shine, it has variable speed motors. > > But there's generally a lower limit on those speeds. With LTO3, at least, > the lower limit is 1/2 the native rate. LTO3's native rate is 80MB/s, so > anything below 40MB/s and you're in trouble. > > Has that changed with LTO4? >From the little I know, LTO-4 will stream from 40-120MBs. The question though is: will it stream continously in that range? Feel free to educate me. regards, jf > > -- > Joshua Baker-LePain > QB3 Shared Cluster Sysadmin > UCSF -- <° >< Jean-François Malouin McConnell Brain Imaging Centre System/Network AdministratorMontréal Neurological Institute 3801 Rue University, Suite WB219, Montréal, Québec, H3A 2B4, Canada
Re: LTO drives
On Fri, 7 Nov 2008 at 10:51am, Nick Brockner wrote LTO4 does not shoe-shine, it has variable speed motors. But there's generally a lower limit on those speeds. With LTO3, at least, the lower limit is 1/2 the native rate. LTO3's native rate is 80MB/s, so anything below 40MB/s and you're in trouble. Has that changed with LTO4? -- Joshua Baker-LePain QB3 Shared Cluster Sysadmin UCSF
Re: LTO drives
LTO4 does not shoe-shine, it has variable speed motors.
-Nick
Jean-Francois Malouin wrote:
* [EMAIL PROTECTED] <[EMAIL PROTECTED]> [20081106 14:56]:
Hello,
Some "real" data for LTO4 :
STATISTICS:
Total Full Incr.
Estimate Time (hrs:min)0:06
Run Time (hrs:min) 1:57
Dump Time (hrs:min)1:28 1:21 0:07
Output Size (meg) 181368.1 178690.5 2677.6
Original Size (meg)181368.1 178690.5 2677.6
Avg Compressed Size (%) -- -- --(level:#disks
...)
Filesystems Dumped 43 12 31 (1:31)
Avg Dump Rate (k/s) 35031.437451.2 6595.0
Tape Time (hrs:min)1:19 1:17 0:02
Tape Size (meg)181368.1 178690.5 2677.6
Tape Used (%) 22.6 22.30.3 (level:#disks
...)
Filesystems Taped43 12 31 (1:31)
Avg Tp Write Rate (k/s) 39421.339850.422939.1
|-> Eeek!
If this is indeed for a LTO4, you are shoe-shinning big time!
You will wear out the tape heads very very rapidly...
jf
USAGE BY TAPE:
Label Time Size %Nb
sauvedata_009 1:19 181368M 22.643
Regards
JP Pozzi
On Mon, 2008-10-27 at 12:28 -0400, Nick Brockner wrote:
Howdy,
Time to replace the aging DAT changer.
Just looking for some input on what LTO3/4 drives (or libraries) work well with
amanda.
Thanks in advance,
Nick
�
Re: LTO drives
* Nick Brockner <[EMAIL PROTECTED]> [20081107 11:53]: > LTO4 does not shoe-shine, it has variable speed motors. yes, you're right but it will stream for xfer rate in the range of 40-120MBs, at least for HP drives. Dunno about the others. cheers, jf > > -Nick > > Jean-Francois Malouin wrote: > >* [EMAIL PROTECTED] <[EMAIL PROTECTED]> [20081106 14:56]: > >>Hello, > >> > >>Some "real" data for LTO4 : > >>STATISTICS: > >> Total Full Incr. > >> > >>Estimate Time (hrs:min)0:06 > >>Run Time (hrs:min) 1:57 > >>Dump Time (hrs:min)1:28 1:21 0:07 > >>Output Size (meg) 181368.1 178690.5 2677.6 > >>Original Size (meg)181368.1 178690.5 2677.6 > >>Avg Compressed Size (%) -- -- --(level:#disks > >>...) > >>Filesystems Dumped 43 12 31 (1:31) > >>Avg Dump Rate (k/s) 35031.437451.2 6595.0 > >> > >>Tape Time (hrs:min)1:19 1:17 0:02 > >>Tape Size (meg)181368.1 178690.5 2677.6 > >>Tape Used (%) 22.6 22.30.3 (level:#disks > >>...) > >>Filesystems Taped43 12 31 (1:31) > >>Avg Tp Write Rate (k/s) 39421.339850.422939.1 > > > > |-> Eeek! > > > >If this is indeed for a LTO4, you are shoe-shinning big time! > >You will wear out the tape heads very very rapidly... > > > >jf > > > >>USAGE BY TAPE: > >> Label Time Size %Nb > >> sauvedata_009 1:19 181368M 22.643 > >> > >> > >>Regards > >> > >>JP Pozzi > >> > >>On Mon, 2008-10-27 at 12:28 -0400, Nick Brockner wrote: > >>>Howdy, > >>> > >>>Time to replace the aging DAT changer. > >>> > >>>Just looking for some input on what LTO3/4 drives (or libraries) work > >>>well with amanda. > >>> > >>>Thanks in advance, > >>>Nick > >>> > >>>� > >>> > > -- <° >< Jean-François Malouin McConnell Brain Imaging Centre System/Network AdministratorMontréal Neurological Institute 3801 Rue University, Suite WB219, Montréal, Québec, H3A 2B4, Canada
Re: LTO drives
* [EMAIL PROTECTED] <[EMAIL PROTECTED]> [20081106 14:56]: > Hello, > > Some "real" data for LTO4 : > STATISTICS: > Total Full Incr. > > Estimate Time (hrs:min)0:06 > Run Time (hrs:min) 1:57 > Dump Time (hrs:min)1:28 1:21 0:07 > Output Size (meg) 181368.1 178690.5 2677.6 > Original Size (meg)181368.1 178690.5 2677.6 > Avg Compressed Size (%) -- -- --(level:#disks > ...) > Filesystems Dumped 43 12 31 (1:31) > Avg Dump Rate (k/s) 35031.437451.2 6595.0 > > Tape Time (hrs:min)1:19 1:17 0:02 > Tape Size (meg)181368.1 178690.5 2677.6 > Tape Used (%) 22.6 22.30.3 (level:#disks > ...) > Filesystems Taped43 12 31 (1:31) > Avg Tp Write Rate (k/s) 39421.339850.422939.1 |-> Eeek! If this is indeed for a LTO4, you are shoe-shinning big time! You will wear out the tape heads very very rapidly... jf > > USAGE BY TAPE: > Label Time Size %Nb > sauvedata_009 1:19 181368M 22.643 > > > Regards > > JP Pozzi > > On Mon, 2008-10-27 at 12:28 -0400, Nick Brockner wrote: > > Howdy, > > > > Time to replace the aging DAT changer. > > > > Just looking for some input on what LTO3/4 drives (or libraries) work well > > with > > amanda. > > > > Thanks in advance, > > Nick > > > > � > > -- <° >< Jean-François Malouin McConnell Brain Imaging Centre System/Network AdministratorMontréal Neurological Institute 3801 Rue University, Suite WB219, Montréal, Québec, H3A 2B4, Canada
Re: LTO drives
Hello,
Some "real" data for LTO4 :
STATISTICS:
Total Full Incr.
Estimate Time (hrs:min)0:06
Run Time (hrs:min) 1:57
Dump Time (hrs:min)1:28 1:21 0:07
Output Size (meg) 181368.1 178690.5 2677.6
Original Size (meg)181368.1 178690.5 2677.6
Avg Compressed Size (%) -- -- --(level:#disks
...)
Filesystems Dumped 43 12 31 (1:31)
Avg Dump Rate (k/s) 35031.437451.2 6595.0
Tape Time (hrs:min)1:19 1:17 0:02
Tape Size (meg)181368.1 178690.5 2677.6
Tape Used (%) 22.6 22.30.3 (level:#disks
...)
Filesystems Taped43 12 31 (1:31)
Avg Tp Write Rate (k/s) 39421.339850.422939.1
USAGE BY TAPE:
Label Time Size %Nb
sauvedata_009 1:19 181368M 22.643
Regards
JP Pozzi
On Mon, 2008-10-27 at 12:28 -0400, Nick Brockner wrote:
> Howdy,
>
> Time to replace the aging DAT changer.
>
> Just looking for some input on what LTO3/4 drives (or libraries) work well
> with
> amanda.
>
> Thanks in advance,
> Nick
>
> �
>
Re: LTO drives
On Mon, Oct 27, 2008 at 11:28 AM, Nick Brockner <[EMAIL PROTECTED]>wrote: > Howdy, > > Time to replace the aging DAT changer. > > Just looking for some input on what LTO3/4 drives (or libraries) work well > with amanda. > > Thanks in advance, > Nick > > For a relatively buget offering in the changer arena we have used a ADIC Scalar 24 (now Quantum) with LVD scsi LTO-2 drive for about 4 years. The tape drive just failed so I'm the process of getting a replacement, but the changer has worked nicely with Amanda up till now :) cost new about $12k.
Re: LTO drives
* Nick Brockner <[EMAIL PROTECTED]> [20081027 14:29]: > Howdy, > > Time to replace the aging DAT changer. > > Just looking for some input on what LTO3/4 drives (or libraries) work well > with amanda. Happy here with a ArcVault48 from Overland and a LTO4. In my tests so far with 2.6.0p2 on a system not in production I usually get +120MiBs and full 800GB on tape. It is very cool to dump 800GB in less than 2hours! jf > > Thanks in advance, > Nick -- <° ><
Re: LTO drives
On Mon, 2008-10-27 at 12:28 -0400, Nick Brockner wrote: > Howdy, > > Time to replace the aging DAT changer. > > Just looking for some input on what LTO3/4 drives (or libraries) work well > with > amanda. > Hello, I use a LTO4 drive purchased througn DELL with full satisfaction ... 800Go without compression is very impressive. The speed is very convenient > 100Go / hour. Regards JPPO
Re: LTO drives
Nick Brockner schrieb: Just looking for some input on what LTO3/4 drives (or libraries) work well with amanda. I'm using a Tandberg Superloader 2U LTO3 since almost 1 year with the latest amanda version, without problems. Regards Marc -- Marc Muehlfeld (Leitung IT) Zentrum fuer Humangenetik und Laboratoriumsmedizin Dr. Klein und Dr. Rost Lochhamer Str. 29 - D-82152 Martinsried Telefon: +49(0)89/895578-0 - Fax: +49(0)89/895578-78 http://www.medizinische-genetik.de
RE: LTO drives
>Just looking for some input on what LTO3/4 drives (or libraries) work well with >amanda. The Quantum PX-502 Library (Rebranded HP LTO-3, 36 data tapes + 2 cleaner tapes, SCSI data interface, web manageable) works extremely well and we've received a persistent 72MB/s write performance over the last 18 months with 256KB block size. Matt
RE: LTO drives
We've had a Neo 4000 with 4xLTO-2 drives that's been humming along for at least 4 years now. I don't know the earliest version of Amanda that was used against it, but when I joined the organization, it was at 2.4-something, we upgraded it to 2.5. As Roy says, nothing fancy, just solid hardware. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Roy Heimbach Sent: October 27, 2008 16:12 To: Nick Brockner Cc: [email protected] Subject: Re: LTO drives We've had great luck with equipment from Overland Storage. We've kept a Neo-2000 library with dual LTO-3 drives busy for 3 years now with no problems so far. Other departments here have had similar experience with Overland equipment: not fancy, but very solid. -Roy On Mon, 27 Oct 2008, Nick Brockner wrote: > Howdy, > > Time to replace the aging DAT changer. > > Just looking for some input on what LTO3/4 drives (or libraries) work well > with amanda. > > Thanks in advance, > Nick > > This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system.
Re: LTO drives
We've had great luck with equipment from Overland Storage. We've kept a Neo-2000 library with dual LTO-3 drives busy for 3 years now with no problems so far. Other departments here have had similar experience with Overland equipment: not fancy, but very solid. -Roy On Mon, 27 Oct 2008, Nick Brockner wrote: Howdy, Time to replace the aging DAT changer. Just looking for some input on what LTO3/4 drives (or libraries) work well with amanda. Thanks in advance, Nick
Re: LTO drives
Nick Brockner wrote: > Howdy, > > Time to replace the aging DAT changer. > > Just looking for some input on what LTO3/4 drives (or libraries) work > well with amanda. I have a Dell PowerVault 124T (16-slot changer with an LTO3 IBM drive, connected using SCSI) and a Dell PowerVault TL2000 (24-slot changer with an LTO4 IBM drive connected using SAS), both work with FreeBSD and Amanda out of the box.. -- With kind regards, Angelo Höngens Systems Administrator -- NetMatch tourism internet software solutions Ringbaan Oost 2b 5013 CA Tilburg T: +31 (0)13 5811088 F: +31 (0)13 5821239 mailto:[EMAIL PROTECTED] http://www.netmatch.nl --
RE: LTO drives
Hi Nick, We have a Dell ML6020, which as I understand is a rebranded Quantum/ADIC Scalar i500, which is itself a rebranded IBM product (I think the T3310, but I could be wrong). The drives in this thing, as we ordered it, are four IBM ULTRIUM LTO4 fibre channel drives, which we connected directly to our SAN switches. There's an option in the library for a fibre blade, which allows for path failover, but we were on a budget. With an RHEL 5 host as the Amanda server (version 2.6.0p1), the biggest headache was finding, installing and configuring the drivers for the drives themselves. However, the changer showed up immediately as an sg device that I could control with mtx. Once I found the drivers, buried deep on one of IBM's ftp sites, I was able to access the drives. I have no major complaints about this library. If the 6020 is a bit much for your needs (128 slots, up to 6 LTO3/4 drives, SAS/FC connectivity, auto-cleaning, LTO4 library-managed encryption), you might want to look at the 6010, or perhaps something from the TL4000 or TL2000 line. Or look at a comparable IBM or Quantum product, whatever gives you the best bang for your buck. For us, the first consideration was encryption (offsite storage), second was cost; we had an existing relationship with Dell (thus the great deal). The 800GB uncompressed cartridge capacity is gravy. :) Cheers -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Nick Brockner Sent: October 27, 2008 12:28 To: [email protected] Subject: LTO drives Howdy, Time to replace the aging DAT changer. Just looking for some input on what LTO3/4 drives (or libraries) work well with amanda. Thanks in advance, Nick This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system.
