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Thanks for the excellent feedback. I?ve learned that: |
1) Raid Mirror can fail and requires proper management |
2) Clone the drive and use the clone |
3) Cloning software works, but not on all systems |
Spoke with our IT guys and they did not recommend cloning over Raid Mirror because some security stuff doesn?t get cloned. The most likely scenario for our incident is that Drive 0 (master) got corrupted, Drive 1 mirrored and got corrupted, then Drive 0 failed. To keep our IT guys happy, we will do Raid Mirror and clone both drives. Use the cloned drives and store the original. |
Thanks, |
Long Chang |
Technical Director |
UH Nanofabrication Facility |
Houston, TX |
lvchang at central.uh.edu<mailto:lvchang at central.uh.edu> |
On Feb 10, 2023, at 12:20 PM, Lino Eugene <lino.eugene at uwaterloo.ca<mailto:lino.eugene at uwaterloo.ca>> wrote: |
Hi Long, |
Most of our computers are connected to a Synology NAS with RAID 1 configuration in a private network. The Synology software Active to Backup Business does back up the Windows 7 and 10 computers and Macrium Reflect is used for Windows XP. Backups are run weekly and several versions are kept for few months. We also have an offline backup of the NAS. |
When a hard drive fails, a new one is installed and the computer can be booted from a recovery media and connects to the NAS to recover a backup. This has saved us from long downtimes few times. |
Best, |
Lino Eugene, P.Eng., Ph.D., |
Micro/nanofabrication process engineer |
Quantum-Nano Fabrication and Characterization Facility |
Office of Research |
QNC 1611 |
University of Waterloo |
200 University Avenue West |
Waterloo, ON, Canada |
N2L 3G1 |
Ph: +1 519-888-4567 #37788 |
Cell: +1 226-929-1685 |
Websites: |
https://uwaterloo.ca/quantum-nano-fabrication-and-characterization-facility/<https://urldefense.com/v3/__https://uwaterloo.ca/quantum-nano-fabrication-and-characterization-facility/__;!!LkSTlj0I!Fz_0sPyy-2VKRKid4LHDshzS9AC5Aabh_6fiQDmHUAKjJgU2Y-rpxmdhefSJI-8spE207wplrHg-KRcmSZYanOkxbidSbQ$> |
https://fab.qnc.uwaterloo.ca/<https://urldefense.com/v3/__https://fab.qnc.uwaterloo.ca/__;!!LkSTlj0I!Fz_0sPyy-2VKRKid4LHDshzS9AC5Aabh_6fiQDmHUAKjJgU2Y-rpxmdhefSJI-8spE207wplrHg-KRcmSZYanOlLZfAVMQ$> |
-----Message d'origine----- |
De : labnetwork <labnetwork-bounces at mtl.mit.edu<mailto:labnetwork-bounces at mtl.mit.edu>> De la part de Chang, Long |
Envoy? : 9 f?vrier 2023 10:15 |
? : Fab Network <labnetwork at mtl.mit.edu<mailto:labnetwork at mtl.mit.edu>> |
Objet : [labnetwork] HDD Best Practice |
Hi All, |
Yesterday we experienced a HDD failure for our AFM. This event should have been prevented by the Raid Mirror with 2 HDD. Our setup where we just have a single working drive and a spare backup clone has been more successful. We are planning to move away from Raid Mirror. Anyone has expertise/experience here they can share? |
Thanks, |
Long Chang |
Technical Director |
UH Nanofabrication Facility |
Houston, TX |
lvchang at central.uh.edu<mailto:lvchang at central.uh.edu> |
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From tony.olsen at utah.edu Wed Feb 15 19:12:49 2023 |
From: tony.olsen at utah.edu (Tony L Olsen) |
Date: Thu, 16 Feb 2023 00:12:49 +0000 |
Subject: [labnetwork] HF storage |
In-Reply-To: <MA1PR01MB399567893801A2B30E2EA9E0EFA39@MA1PR01MB3995.INDPRD01.PROD.OUTLOOK.COM> |
References: <MA1PR01MB399567893801A2B30E2EA9E0EFA39@MA1PR01MB3995.INDPRD01.PROD.OUTLOOK.COM> |
Message-ID: <BYAPR11MB3496B7A8698B6019C5CEA670F1A09@BYAPR11MB3496.namprd11.prod.outlook.com> |
Savitha |
Unfortunately, I learned a long time ago that no matter how foolproof your system is, there is always a bigger fool. I have also found that complex systems or exceptions tend to make things worse. The simpler the system, the easier to follow and manage. |
With that said, we developed a system that has worked well for us. We have created several chemical categories. Each category has a two-letter code and description (e.g., GA - General Acid, PR - Photoresist, HF - Hydrofluoric Acid, OA - Oxidizing Acid, SA - Sulfuric Acid, etc.). We apply a chemical code sticker to EVERY chemical container that enters our facility - both chemicals supplied by Staff and those purchased separately by lab members. The sticker is usually placed near the neck of the bottle. The stickers are 1.25 X 1.625" in size. The two-letter code is a 60pt font, while the description is only 11pt. We place a similar, but larger sticker at every location where that chemical can be stored or used. Those stickers are 4 x 3.25", with the code at 200pt and the description at 30pt. For storage and usage, lab members simply have to match the code on the bottle to the code on the wet bench, fume hood, storage cabinet, or storage drawer. If I find a chemical that needs some special handling or segregation I don't create an exception, I create a new category. |
We decided not to try any color coding for two primary reasons: 1) yellow lights distort colors and 2) color blindness. |
Prior to this system, I was frequently finding chemicals where they shouldn't be. Since this system was implemented, I have rarely seen a violation (refer to my first statement). This approach may not necessarily address your real concern, but it has eased my worries considerably. In my opinion, using a different color bottle would only be effective if it is the ONLY chemical in the facility of that or similar color bottle. And, you may run in to supply chain issues for non-standard bottles once in a while. |
We provide both 49% HF and 6:1 BOE in gallon bottles. |
Tony Olsen |
Nanofab Cleanroom Supervisor/Process Engineer |
University of Utah |
36 S Wasatch Drive, Suite 2500 |
Salt Lake City, UT 84112 |
801-587-0651 |
www.nanofab.utah.edu |
From: Savitha P <savithap at iisc.ac.in> |
Sent: Wednesday, February 15, 2023 05:19 |
To: labnetwork at mtl.mit.edu |
Subject: Re: [labnetwork] HF storage |
Hi! |
We recently had a couple of occasions where users had mistakenly used Hydrofluoric acid in place of Hydrochloric acid during RCA cleaning. To avoid this, one of the suggestions we have received from our OLSEH is to store HF in a different coloured bottle (currently all acids are stored in white translucent polypropylene bottles which are properly labelled). Accordingly, we had considered storing HF in opaque, brown colour HDPE bottles. However, that was not deemed acceptable by a section of users saying bottles should be translucent so that acid level inside can be judged. |
Could you please let me know how small quantities of HF are stored in your respective fabs. Is there any regulation governing storage of HF, so that we could implement the same. |
Thanks and regards, |
Savitha |
Dr. Savitha P |
Chief Operating Officer |
National Nanofabrication Centre |
Centre for Nanoscience and Engineering |
Indian Institute of Science |
Bangalore - 560012 |
India. |
Ph. +91 80 2293 3319 |
www.cense.iisc.ac.in<http://www.cense.iisc.ac.in> |
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From jeanne.guo at rice.edu Thu Feb 16 11:11:52 2023 |
From: jeanne.guo at rice.edu (Jing Guo) |
Date: Thu, 16 Feb 2023 10:11:52 -0600 |
Subject: [labnetwork] HF storage |
In-Reply-To: <MA1PR01MB399567893801A2B30E2EA9E0EFA39@MA1PR01MB3995.INDPRD01.PROD.OUTLOOK.COM> |
References: <MA1PR01MB399567893801A2B30E2EA9E0EFA39@MA1PR01MB3995.INDPRD01.PROD.OUTLOOK.COM> |
Message-ID: <25713BEA-37FD-4DC2-A57E-37A08B3A338D@rice.edu> |
Hi Savitha, |
This is Jing from Rice U Nanofab. Fortunately we have enough space to store HF or BOE in a separate cabinet. HCl is stored with the other acids in the ?General Acids? cabinet. Also all HF related processes will be performed in the separate HF wet bench which is a independent bench from other benches. For all of our chemicals, we are using the ?Two-letter? labelling system which I learned from Utah NanoFab a long time ago. All chemical bottles, storage cabinets and wet benches have a ?two letter? sticker on. All HF bottles have the ?HF? stickers. HCl or other Acids have the ?GA? stickers (general acid). The stickers have to match to the cabinets and benches when you need to store or use them. |
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