Date: Mon, 7 Dec 2015 14:45:17 -0700 From: Scott Long <scott4long@yahoo.com> To: prateek sethi <prateekrootkey@gmail.com> Cc: freebsd-scsi@freebsd.org Subject: Re: bad disk discovery Message-ID: <6A7832F8-53EB-4641-8EF6-E0E6175EB52D@yahoo.com> In-Reply-To: <CABD8d0rTD2Fu9QsqLKREBcA-nndQrUH8F8DWrPh_KQB64qjy1Q@mail.gmail.com> References: <CABD8d0rTD2Fu9QsqLKREBcA-nndQrUH8F8DWrPh_KQB64qjy1Q@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi, If your situation is accurate and the disk is not responding properly to regular commands then it’s unlikely that it will respond to SMART commands either. Sometimes these situations are caused by a bad cable, bad controller, or buggy software/firmware, and only rarely will the standard statistics in SMART pick up these kinds of errors. SMART is better at tracking wear rates and error rates on the physical media, both HDD and SSD, but even then it’s hard for it to be accurately predictive or even accurately diagnostic. For your case, I recommend that you describe your hardware and software configuration in more detail, and look for physical abnormalities in the cabling and connections. Once that is ruled and and the rest of us know what kind of hardware you’re dealing with, we might be able to make better commendations. Scott > On Dec 7, 2015, at 11:07 AM, prateek sethi <prateekrootkey@gmail.com> wrote: > > Hi , > > Is there any way or tool to find out that a disk which is not responding > properly is really bad or not? Sometimes I have seen that there is lot of > CDB error for a drive and system reboot makes every thing fine. What can be > reasons for such kind of scenarios? > > I know smartctl is the one which can help. I have some couple of question > regarding this . > > 1. What if disk does not support smartctl? > 2. How I can do smartest use of smartctl command like which parameters can > tell that the disk is actually bad? > 3. What other test I can perform to make it sure that disk has completely > gone? > > > Please tell me correct place to ask this question if I am asking at wrong > place. > _______________________________________________ > freebsd-scsi@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-scsi > To unsubscribe, send any mail to "freebsd-scsi-unsubscribe@freebsd.org"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?6A7832F8-53EB-4641-8EF6-E0E6175EB52D>