Mailing List Archive: Netapp: toasters

Power change 110 to 208v without downtime

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SRajagopalan at williamoneil

Nov 23, 2009, 11:31 AM

Post #1 of 9 (3218 views)
Permalink

Power change 110 to 208v without downtime

Our filers and shelves are currently on 110v power. We'd like to switch
to 208v, possibly without downtime. I'm thinking of moving each power
supply one by one from 110v to 208v. Are there any issues doing it this
way?

Thanks

Suresh

hollandwl at gmail

Nov 23, 2009, 11:59 AM

Post #2 of 9 (3070 views)
Permalink

Re: Power change 110 to 208v without downtime [In reply to]

I certainly would not be brave enough to try that. Not sure what having 208
on one side and 110 on the other would do, but seems like a potential for
disaster.

On Mon, Nov 23, 2009 at 2:31 PM, Suresh Rajagopalan <
SRajagopalan [at] williamoneil> wrote:

> Our filers and shelves are currently on 110v power. We’d like to switch
> to 208v, possibly without downtime. I’m thinking of moving each power
> supply one by one from 110v to 208v. Are there any issues doing it this
> way?
>
>
>
> Thanks
>
> Suresh
>
>
>

tmacmd at gmail

Nov 23, 2009, 12:09 PM

Post #3 of 9 (3071 views)
Permalink

Re: Power change 110 to 208v without downtime [In reply to]

Well, they are auto-ranging power supplies. It should work.
I was always told it is fine for a very short while, just don't bet the bank
on leaving it that way.

--tmac
Tim McCarthy
Principal Consultant

RedHat Certified Engineer
804006984323821 (RHEL4)
805007643429572 (RHEL5)

On Mon, Nov 23, 2009 at 2:59 PM, Bill Holland <hollandwl [at] gmail> wrote:

> I certainly would not be brave enough to try that. Not sure what having
> 208 on one side and 110 on the other would do, but seems like a potential
> for disaster.
>
>
> On Mon, Nov 23, 2009 at 2:31 PM, Suresh Rajagopalan <
> SRajagopalan [at] williamoneil> wrote:
>
>> Our filers and shelves are currently on 110v power. We’d like to switch
>> to 208v, possibly without downtime. I’m thinking of moving each power
>> supply one by one from 110v to 208v. Are there any issues doing it this
>> way?
>>
>>
>>
>> Thanks
>>
>> Suresh
>>
>>
>>
>
>

khschoener at lynxtechnologies

Nov 23, 2009, 12:25 PM

Post #4 of 9 (3074 views)
Permalink

RE: Power change 110 to 208v without downtime [In reply to]

..shouldn't be a problem. The low-side of the Power Supply is the same
for both high-side voltages. So, assuming you're plugging into a 208V
power source on the "new" Power Supplies, it should work fine.

Best Regards,

Kevin

________________________________

From: owner-toasters [at] mathworks [mailto:owner-toasters [at] mathworks]
On Behalf Of Bill Holland
Sent: Monday, November 23, 2009 2:59 PM
To: Suresh Rajagopalan
Cc: toasters [at] mathworks
Subject: Re: Power change 110 to 208v without downtime

I certainly would not be brave enough to try that. Not sure what having
208 on one side and 110 on the other would do, but seems like a
potential for disaster.

On Mon, Nov 23, 2009 at 2:31 PM, Suresh Rajagopalan
<SRajagopalan [at] williamoneil> wrote:

Our filers and shelves are currently on 110v power. We'd like to switch
to 208v, possibly without downtime. I'm thinking of moving each power
supply one by one from 110v to 208v. Are there any issues doing it this
way?

Thanks

Suresh

abs at blueskystudios

Nov 23, 2009, 12:28 PM

Post #5 of 9 (3077 views)
Permalink

Re: Power change 110 to 208v without downtime [In reply to]

My educated guess is that you can do this safely and for as long as you
wish. The power supplies are pretty much independent of one another,
and they produce the same output regardless of whether you put 110V or
208V into them -- the filer doesn't know the difference. I have done
this with large HP DL-class servers and have not had any problems.

Suresh Rajagopalan wrote:
> Our filers and shelves are currently on 110v power. We’d like to switch
> to 208v, possibly without downtime. I’m thinking of moving each power
> supply one by one from 110v to 208v. Are there any issues doing it this
> way?

jeremy.page at gilbarco

Nov 23, 2009, 12:40 PM

Post #6 of 9 (3055 views)
Permalink

RE: Power change 110 to 208v without downtime [In reply to]

Let us know if it works :-)

________________________________

From: owner-toasters [at] mathworks [mailto:owner-toasters [at] mathworks]
On Behalf Of Kevin H. Schoener
Sent: Monday, November 23, 2009 3:25 PM
To: Bill Holland; Suresh Rajagopalan
Cc: toasters [at] mathworks
Subject: RE: Power change 110 to 208v without downtime

..shouldn't be a problem. The low-side of the Power Supply is the same
for both high-side voltages. So, assuming you're plugging into a 208V
power source on the "new" Power Supplies, it should work fine.

Best Regards,

Kevin

________________________________

From: owner-toasters [at] mathworks [mailto:owner-toasters [at] mathworks]
On Behalf Of Bill Holland
Sent: Monday, November 23, 2009 2:59 PM
To: Suresh Rajagopalan
Cc: toasters [at] mathworks
Subject: Re: Power change 110 to 208v without downtime

I certainly would not be brave enough to try that. Not sure what having
208 on one side and 110 on the other would do, but seems like a
potential for disaster.

On Mon, Nov 23, 2009 at 2:31 PM, Suresh Rajagopalan
<SRajagopalan [at] williamoneil> wrote:

Our filers and shelves are currently on 110v power. We'd like to switch
to 208v, possibly without downtime. I'm thinking of moving each power
supply one by one from 110v to 208v. Are there any issues doing it this
way?

Thanks

Suresh

Please be advised that this email may contain confidential information.
If you are not the intended recipient, please do not read, copy or
re-transmit this email. If you have received this email in error,
please notify us by email by replying to the sender and by telephone
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In addition, Danaher and its subsidiaries disclaim that the content of
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any
contract or agreement or any amendment thereto; provided that the
foregoing disclaimer does not invalidate the binding effect of any
digital or other electronic reproduction of a manual signature that is
included in any attachment to this email.

Peter.Learmonth at netapp

Nov 23, 2009, 1:20 PM

Post #7 of 9 (3062 views)
Permalink

RE: Power change 110 to 208v without downtime [In reply to]

It works. I've done it. Gotta check on support.

-----Original Message-----
From: Page, Jeremy <jeremy.page [at] gilbarco>
Sent: Monday, November 23, 2009 12:48 PM
Cc: toasters [at] mathworks <toasters [at] mathworks>
Subject: RE: Power change 110 to 208v without downtime

Let us know if it works :-)

________________________________

From: owner-toasters [at] mathworks [mailto:owner-toasters [at] mathworks]
On Behalf Of Kevin H. Schoener
Sent: Monday, November 23, 2009 3:25 PM
To: Bill Holland; Suresh Rajagopalan
Cc: toasters [at] mathworks
Subject: RE: Power change 110 to 208v without downtime

..shouldn't be a problem. The low-side of the Power Supply is the same
for both high-side voltages. So, assuming you're plugging into a 208V
power source on the "new" Power Supplies, it should work fine.

Best Regards,

Kevin

________________________________

From: owner-toasters [at] mathworks [mailto:owner-toasters [at] mathworks]
On Behalf Of Bill Holland
Sent: Monday, November 23, 2009 2:59 PM
To: Suresh Rajagopalan
Cc: toasters [at] mathworks
Subject: Re: Power change 110 to 208v without downtime

I certainly would not be brave enough to try that. Not sure what having
208 on one side and 110 on the other would do, but seems like a
potential for disaster.

On Mon, Nov 23, 2009 at 2:31 PM, Suresh Rajagopalan
<SRajagopalan [at] williamoneil> wrote:

Our filers and shelves are currently on 110v power. We'd like to switch
to 208v, possibly without downtime. I'm thinking of moving each power
supply one by one from 110v to 208v. Are there any issues doing it this
way?

Thanks

Suresh

Please be advised that this email may contain confidential information.
If you are not the intended recipient, please do not read, copy or
re-transmit this email. If you have received this email in error,
please notify us by email by replying to the sender and by telephone
(call us collect at +1 202-828-0850) and delete this message and any
attachments. Thank you in advance for your cooperation and assistance.

In addition, Danaher and its subsidiaries disclaim that the content of
this email constitutes an offer to enter into, or the acceptance of,
any
contract or agreement or any amendment thereto; provided that the
foregoing disclaimer does not invalidate the binding effect of any
digital or other electronic reproduction of a manual signature that is
included in any attachment to this email.

reger at netapp

Nov 23, 2009, 2:32 PM

Post #8 of 9 (3065 views)
Permalink

Re: Power change 110 to 208v without downtime [In reply to]

We in Engineering think this is fine and works.
It's probably obvious but:

1. observe software environmental monitoring to verify both PSUs are up and
running.
2. power off one PSU (using AC switch on PSU)
3. unplug from 110V and plug into 208V
4. power it back on
5. observe software environmental monitoring to verify new PSU is up and
running.
6. repeat process for the other PSU
7. observe software environmental monitoring to verify both PSUs are up and
running.

Brad.

> From: "Learmonth, Peter" <Peter.Learmonth [at] netapp>
> Date: Mon, 23 Nov 2009 13:20:40 -0800
> To: "Page, Jeremy" <jeremy.page [at] gilbarco>
> Cc: <toasters [at] mathworks>
> Subject: RE: Power change 110 to 208v without downtime
>
> It works. I've done it. Gotta check on support.
>
> -----Original Message-----
> From: Page, Jeremy <jeremy.page [at] gilbarco>
> Sent: Monday, November 23, 2009 12:48 PM
> Cc: toasters [at] mathworks <toasters [at] mathworks>
> Subject: RE: Power change 110 to 208v without downtime
>
> Let us know if it works :-)
>
> ________________________________
>
> From: owner-toasters [at] mathworks [mailto:owner-toasters [at] mathworks]
> On Behalf Of Kevin H. Schoener
> Sent: Monday, November 23, 2009 3:25 PM
> To: Bill Holland; Suresh Rajagopalan
> Cc: toasters [at] mathworks
> Subject: RE: Power change 110 to 208v without downtime
>
>
>
> ..shouldn't be a problem. The low-side of the Power Supply is the same
> for both high-side voltages. So, assuming you're plugging into a 208V
> power source on the "new" Power Supplies, it should work fine.
>
>
>
> Best Regards,
>
> Kevin
>
> ________________________________
>
> From: owner-toasters [at] mathworks [mailto:owner-toasters [at] mathworks]
> On Behalf Of Bill Holland
> Sent: Monday, November 23, 2009 2:59 PM
> To: Suresh Rajagopalan
> Cc: toasters [at] mathworks
> Subject: Re: Power change 110 to 208v without downtime
>
>
>
> I certainly would not be brave enough to try that. Not sure what having
> 208 on one side and 110 on the other would do, but seems like a
> potential for disaster.
>
> On Mon, Nov 23, 2009 at 2:31 PM, Suresh Rajagopalan
> <SRajagopalan [at] williamoneil> wrote:
>
> Our filers and shelves are currently on 110v power. We'd like to switch
> to 208v, possibly without downtime. I'm thinking of moving each power
> supply one by one from 110v to 208v. Are there any issues doing it this
> way?
>
>
>
> Thanks
>
> Suresh

jeremy.page at gilbarco

Nov 23, 2009, 5:48 PM

Post #9 of 9 (3069 views)
Permalink

RE: Power change 110 to 208v without downtime [In reply to]

Now that's why I like toasters.

-----Original Message-----
From: Brad Reger [mailto:reger [at] netapp]
Sent: Monday, November 23, 2009 5:33 PM
To: Learmonth, Peter; Page, Jeremy
Cc: toasters [at] mathworks
Subject: Re: Power change 110 to 208v without downtime

We in Engineering think this is fine and works.
It's probably obvious but:

1. observe software environmental monitoring to verify both PSUs are up
and
running.
2. power off one PSU (using AC switch on PSU)
3. unplug from 110V and plug into 208V
4. power it back on
5. observe software environmental monitoring to verify new PSU is up and
running.
6. repeat process for the other PSU
7. observe software environmental monitoring to verify both PSUs are up
and
running.

Brad.

> From: "Learmonth, Peter" <Peter.Learmonth [at] netapp>
> Date: Mon, 23 Nov 2009 13:20:40 -0800
> To: "Page, Jeremy" <jeremy.page [at] gilbarco>
> Cc: <toasters [at] mathworks>
> Subject: RE: Power change 110 to 208v without downtime
>
> It works. I've done it. Gotta check on support.
>
> -----Original Message-----
> From: Page, Jeremy <jeremy.page [at] gilbarco>
> Sent: Monday, November 23, 2009 12:48 PM
> Cc: toasters [at] mathworks <toasters [at] mathworks>
> Subject: RE: Power change 110 to 208v without downtime
>
> Let us know if it works :-)
>
> ________________________________
>
> From: owner-toasters [at] mathworks
[mailto:owner-toasters [at] mathworks]
> On Behalf Of Kevin H. Schoener
> Sent: Monday, November 23, 2009 3:25 PM
> To: Bill Holland; Suresh Rajagopalan
> Cc: toasters [at] mathworks
> Subject: RE: Power change 110 to 208v without downtime
>
>
>
> ..shouldn't be a problem. The low-side of the Power Supply is the
same
> for both high-side voltages. So, assuming you're plugging into a 208V
> power source on the "new" Power Supplies, it should work fine.
>
>
>
> Best Regards,
>
> Kevin
>
> ________________________________
>
> From: owner-toasters [at] mathworks
[mailto:owner-toasters [at] mathworks]
> On Behalf Of Bill Holland
> Sent: Monday, November 23, 2009 2:59 PM
> To: Suresh Rajagopalan
> Cc: toasters [at] mathworks
> Subject: Re: Power change 110 to 208v without downtime
>
>
>
> I certainly would not be brave enough to try that. Not sure what
having
> 208 on one side and 110 on the other would do, but seems like a
> potential for disaster.
>
> On Mon, Nov 23, 2009 at 2:31 PM, Suresh Rajagopalan
> <SRajagopalan [at] williamoneil> wrote:
>
> Our filers and shelves are currently on 110v power. We'd like to
switch
> to 208v, possibly without downtime. I'm thinking of moving each power
> supply one by one from 110v to 208v. Are there any issues doing it
this
> way?
>
>
>
> Thanks
>
> Suresh

Please be advised that this email may contain confidential information.
If you are not the intended recipient, please do not read, copy or
re-transmit this email. If you have received this email in error,
please notify us by email by replying to the sender and by telephone
(call us collect at +1 202-828-0850) and delete this message and any
attachments. Thank you in advance for your cooperation and assistance.

In addition, Danaher and its subsidiaries disclaim that the content of
this email constitutes an offer to enter into, or the acceptance of,
any
contract or agreement or any amendment thereto; provided that the
foregoing disclaimer does not invalidate the binding effect of any
digital or other electronic reproduction of a manual signature that is
included in any attachment to this email.

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