Re: [Networker] Upgrade to LTO4 library, opinions about these libraries ?
2009-02-20 12:04:00
Let me also provide you some numbers for the StorageTek SL500 library
regarding robotic speed.
Sorry to se some people are unhappy with it, but this may be not very
representative as since the
introduction 3-4 years ago, more than 11.000 units has been implemented
worldwide.
Exchanges per hour, base unit 50 slots (drive to cell to drive), average
53 sec, (exchanges per hour = 67)
Exchanges per hour, all 5 modules (drive to cell to drive), average 67
sec, max 83
Exchanges per hour, base unit 50 slots (cell to cell and back), average
20 sec
Exchanges per hour, all 5 modules (cell to cell and back), average 24
sec, max 29
Access time from cartridge to drive, base unit 50 slots, avarage 12 sec
Access time from cartridge to drive, all 5 modules, avarage 13 sec, max 16
Audit time - Open/close door to "ready" state, 6 min with 50 slots, 31
min with all 5 modules and 18 drives
regards -attila
--
********************************************************************
Attila Mester 5 Digit Sun internal: x62534
Data Protection Architect Tel: (+49 89) 46 008 2534
Sun Microsystems GmbH Fax: (+49 89) 46 008 2583
Sonnenallee 1 Mobil: +49 172 812 5947
85551 Heimstetten / Germany mail: attila.mester AT sun DOT com
********************************************************************
Clark, Patti schrieb:
We have 2 Quantum i500 libraries. One has been in use since November, the
other will be in production next month. The one that we've been using replaced
a Quantum M2500 with LTO-2 drives. The i500 has been flawless, the picker is
much faster over the M2500. We are very happy with the i500 and would
recommend it to anyone. We have one dual-channel fibre hba at this time. The
controller shares one of the tape drive channels for communications. We'd had
2-dual channels SCSI hbas for the LTO-2 library, but we had to retain one of
the hbas for the controller (Dell daughter card) to manage the disk drives. I
mention this because we have 3 IBM tape drives in the i500, but can only access
2 of them at this time. Even with that, the LTO-4 drives are so much faster,
that we are completing our largest backups in less time than with 3 LTO-2
drives, about 1/3 - 1/2 less time.
While we have a couple of SANS here, our backups are all server-based file
systems. Our networker server is RHEL4 on a Dell 2850. We use v7.4.3
Networker.
You didn't indicate whether you were planning on using tape encryption or not.
Patti Clark
DOE/OSTI
-----Original Message-----
From: EMC NetWorker discussion
[mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On Behalf Of Manel Rodero
Sent: Friday, February 20, 2009 6:47 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] Upgrade to LTO4 library, opinions about
these libraries ?
Hello,
We're evaluating different offers por changing our old library (a
Qualstar TLS6460 with 60 slots/4 drives SDLT320) to a new
LTO4 library
with FC interfaces.
Our initial idea is to connect the library (i.e. its 2 initial LTO4
drives) directly to the server using a dual channel HBA
interface, but
we are evaluating the connection to our SAN too (for having
some hosts
direct backup to the library like storage nodes).
We have different offers by our providers and we would like
to hear your
opinions about these libraries (support, problems, evolution, etc.):
* SpectraLogic Spectra T120 (30 slots, 2xLTO4,
* Quantum Scalar i500 (41 slots, 2xLTO4, I/O magazine 6 slots)
* Dell PowerVault ML6010 (41 slots, 2xLTO4, I/O magazine 6 slots)
* Sun StorageTek SL500 (30 slots, 2xLTO4, CAP magazine 5 slots)
Thank you very much!
--
o o o Manel Rodero Blánquez | LCFIB - FIB - UPC
o o o IT System Manager | Campus Nord - Modul B6
o o o Barcelona School of Informatics | Jordi Girona, 1-3
U P C Technical University of Catalonia | 08034 Barcelona (Spain)
|
manel AT fib.upc DOT edu | Tel: +00 34 93 401 0847
http://www.fib.upc.edu/ | Fax: +00 34 93 401 7040
To sign off this list, send email to
listserv AT listserv.temple DOT edu and type "signoff networker" in
the body of the email. Please write to
networker-request AT listserv.temple DOT edu if you have any
problems with this list. You can access the archives at
http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER
To sign off this list, send email to listserv AT listserv.temple DOT edu and type
"signoff networker" in the body of the email. Please write to networker-request
AT listserv.temple DOT edu if you have any problems with this list. You can access the
archives at http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER
--
********************************************************************
Attila Mester 5 Digit Sun internal: x62534
Data Protection Architect Tel: (+49 89) 46 008 2534
Sun Microsystems GmbH Fax: (+49 89) 46 008 2583
Sonnenallee 1 Mobil: +49 172 812 5947
85551 Heimstetten / Germany mail: attila.mester AT sun DOT com
********************************************************************
To sign off this list, send email to listserv AT listserv.temple DOT edu and type
"signoff networker" in the body of the email. Please write to networker-request
AT listserv.temple DOT edu if you have any problems with this list. You can access the
archives at http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER
|
Previous by Date: |
Re: [Networker] Upgrade to LTO4 library, opinions about these libraries ?, Browning, David |
Next by Date: |
[Networker] Owner notification for aborted savegroups, Goslin, Paul |
Previous by Thread: |
Re: [Networker] Upgrade to LTO4 library, opinions about these libraries ?, Clark, Patti |
Next by Thread: |
Re: [Networker] Upgrade to LTO4 library, opinions about these libraries ?, Goslin, Paul |
Indexes: |
[Date]
[Thread]
[Top]
[All Lists] |
|
|