Veritas-bu

[Veritas-bu] Off-topic: Mean time between cleaning on LTO drives?

2004-05-10 12:33:46
Subject: [Veritas-bu] Off-topic: Mean time between cleaning on LTO drives?
From: jstephens AT ti DOT com (Stephens, John)
Date: Mon, 10 May 2004 11:33:46 -0500
This is a multi-part message in MIME format.

------_=_NextPart_001_01C436AC.909381EF
Content-Type: text/plain;
        charset="US-ASCII"
Content-Transfer-Encoding: quoted-printable

Cleaning is abrasive to the heads.  You should let the drive tell the
robot when it needs cleaning and let the robot do the cleaning for you.
I wouldn't force a cleaning.  If you are having issues with one drive, I
would suspect alignment problems and you should have maintenance replace
it.  If you are having issues with multiple drives, I would suspect the
media. =20
=20
My 2 cents.
=20
John D Stephens
jstephens AT ti DOT com
=20

  _____ =20

From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of
marshall.a.skare AT accenture DOT com
Sent: Thursday, April 29, 2004 3:32 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Off-topic: Mean time between cleaning on LTO
drives?



Hi everyone,

=20

Apologies that this isn't NBU specific, but Googling doesn't give me an
answer to this question that I've had for a while.  I'm relatively new
to the backup world, so I haven't worked with the Seagate Viper LTO
drives I have long enough to know how long I can expect to go between
cleanings.  I know the drives are supposed to kick on an LED when they
think they need a cleaning, but I'm getting media write errors in NBU,
and no LED.  So, I'm thinking the drives may need cleaning.  How long
should I be able to go?  40 hours?  80 hours?  400 hours?  800 hours?
What have you seen in your environment?  I've also seen that LTO drives
will resist cleaning requests until they ask for it.  Are there tricks
to force a cleaning of a drive?

=20

Thanks for any replies!

=20

Marshall Skare

Accenture Technology Infrastructure Services - Unix Engineering

(612) 277-4434

=20

This message is for the designated recipient only and may contain
privileged, proprietary, or otherwise private information. If you have
received it in error, please notify the sender immediately and delete
the original. Any other use of the email by you is prohibited.=20


------_=_NextPart_001_01C436AC.909381EF
Content-Type: text/html;
        charset="US-ASCII"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Dus-ascii">
<META content=3D"MSHTML 6.00.2800.1400" name=3DGENERATOR>
<STYLE>@font-face {
        font-family: Book Antiqua;
}
@page Section1 {size: 8.5in 11.0in; margin: 1.0in .75in 1.0in .75in; }
P.MsoNormal {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Book Antiqua"
}
LI.MsoNormal {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Book Antiqua"
}
DIV.MsoNormal {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Book Antiqua"
}
H1 {
        FONT-SIZE: 14pt; MARGIN: 12pt 0in 3pt; FONT-FAMILY: "Book Antiqua"
}
H2 {
        FONT-SIZE: 12pt; MARGIN: 12pt 0in 3pt; FONT-STYLE: italic; FONT-FAMILY: 
=
"Book Antiqua"
}
H3 {
        FONT-WEIGHT: normal; FONT-SIZE: 12pt; MARGIN: 12pt 0in 3pt; =
FONT-FAMILY: "Book Antiqua"
}
P.MsoHeader {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Book Antiqua"
}
LI.MsoHeader {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Book Antiqua"
}
DIV.MsoHeader {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Book Antiqua"
}
P.MsoFooter {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Book Antiqua"
}
LI.MsoFooter {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Book Antiqua"
}
DIV.MsoFooter {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Book Antiqua"
}
A:link {
        COLOR: blue; TEXT-DECORATION: underline
}
SPAN.MsoHyperlink {
        COLOR: blue; TEXT-DECORATION: underline
}
A:visited {
        COLOR: purple; TEXT-DECORATION: underline
}
SPAN.MsoHyperlinkFollowed {
        COLOR: purple; TEXT-DECORATION: underline
}
P.ABLOCKPARA {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Book Antiqua"
}
LI.ABLOCKPARA {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Book Antiqua"
}
DIV.ABLOCKPARA {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Book Antiqua"
}
P.ABULLET {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt 16.55pt; TEXT-INDENT: -16.55pt; =
FONT-FAMILY: "Book Antiqua"
}
LI.ABULLET {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt 16.55pt; TEXT-INDENT: -16.55pt; =
FONT-FAMILY: "Book Antiqua"
}
DIV.ABULLET {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt 16.55pt; TEXT-INDENT: -16.55pt; =
FONT-FAMILY: "Book Antiqua"
}
P.AINDENTEDBULLET {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt 33.1pt; TEXT-INDENT: -16.55pt; =
FONT-FAMILY: "Book Antiqua"
}
LI.AINDENTEDBULLET {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt 33.1pt; TEXT-INDENT: -16.55pt; =
FONT-FAMILY: "Book Antiqua"
}
DIV.AINDENTEDBULLET {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt 33.1pt; TEXT-INDENT: -16.55pt; =
FONT-FAMILY: "Book Antiqua"
}
P.AINDENTEDPARA {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt 16.55pt; FONT-FAMILY: "Book =
Antiqua"
}
LI.AINDENTEDPARA {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt 16.55pt; FONT-FAMILY: "Book =
Antiqua"
}
DIV.AINDENTEDPARA {
        FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt 16.55pt; FONT-FAMILY: "Book =
Antiqua"
}
SPAN.EmailStyle23 {
        COLOR: windowtext; FONT-FAMILY: Arial
}
DIV.Section1 {
        page: Section1
}
</STYLE>
</HEAD>
<BODY lang=3DEN-US vLink=3Dpurple link=3Dblue>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D452273016-10052004><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>Cleaning is abrasive to the heads.&nbsp; You =
should let the=20
drive tell the robot when it needs cleaning and let the robot do the =
cleaning=20
for you.&nbsp; I wouldn't force a cleaning.&nbsp; If you are having =
issues with=20
one drive, I would suspect alignment problems and you should have =
maintenance=20
replace it.&nbsp; If you are having issues with multiple drives, I would =
suspect=20
the media.&nbsp; </FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D452273016-10052004><FONT =
face=3DArial=20
color=3D#0000ff size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D452273016-10052004><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>My 2 cents.</FONT></SPAN></DIV>
<DIV>&nbsp;</DIV>
<DIV align=3Dleft><FONT face=3DArial size=3D2>John D =
Stephens</FONT></DIV>
<DIV align=3Dleft><FONT face=3DArial size=3D2><A=20
href=3D"mailto:jstephens AT ti DOT com">jstephens AT ti DOT com</A></FONT></DIV>
<DIV>&nbsp;</DIV><BR>
<DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
<HR tabIndex=3D-1>
<FONT face=3DTahoma size=3D2><B>From:</B> =
veritas-bu-admin AT mailman.eng.auburn DOT edu=20
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] <B>On Behalf Of=20
</B>marshall.a.skare AT accenture DOT com<BR><B>Sent:</B> Thursday, April 29, =
2004 3:32=20
PM<BR><B>To:</B> veritas-bu AT mailman.eng.auburn DOT edu<BR><B>Subject:</B>=20
[Veritas-bu] Off-topic: Mean time between cleaning on LTO=20
drives?<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=3DSection1>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Hi =
everyone,</SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT>&nbsp;</P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Apologies that this =
isn&#8217;t NBU=20
specific, but Googling doesn&#8217;t give me an answer to this question =
that I&#8217;ve had=20
for a while.&nbsp; I&#8217;m relatively new to the backup world, so I =
haven&#8217;t worked=20
with the Seagate Viper LTO drives I have long enough to know how long I =
can=20
expect to go between cleanings.&nbsp; I know the drives are supposed to =
kick on=20
an LED when they think they need a cleaning, but I&#8217;m getting media =
write errors=20
in NBU, and no LED.&nbsp; So, I&#8217;m thinking the drives may need =
cleaning.&nbsp;=20
How long should I be able to go?&nbsp; 40 hours?&nbsp; 80 hours?&nbsp; =
400=20
hours?&nbsp; 800 hours?&nbsp; What have you seen in your =
environment?&nbsp; I&#8217;ve=20
also seen that LTO drives will resist cleaning requests until they ask =
for=20
it.&nbsp; Are there tricks to force a cleaning of a =
drive?</SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT>&nbsp;</P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Thanks for any=20
replies!</SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT>&nbsp;</P>
<P class=3DMsoNormal><FONT face=3D"Book Antiqua" size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt">Marshall Skare</SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3D"Book Antiqua" size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt">Accenture Technology Infrastructure Services - =
Unix=20
Engineering</SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3D"Book Antiqua" size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt">(612) 277-4434</SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3D"Book Antiqua" =
size=3D2></FONT>&nbsp;</P></DIV>
<P></P>
<P>This message is for the designated recipient only and may contain =
privileged,=20
proprietary, or otherwise private information. If you have received it =
in error,=20
please notify the sender immediately and delete the original. Any other =
use of=20
the email by you is prohibited. </P></BODY></HTML>

------_=_NextPart_001_01C436AC.909381EF--

<Prev in Thread] Current Thread [Next in Thread>